Rule 8.3 - RIO TINTO

FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE
              (Rule 8.3 of the City Code on Takeovers and Mergers)


1.   KEY INFORMATION

Name of person dealing        BARCLAYS PLC
(Note 1)
Company dealt in              RIO TINTO
Class of relevant security    ORD GBP0.10
to which the dealings being
disclosed relate (Note 2)
Date of dealing               08 November 2007

2.   INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a)  Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                            Long                     Short

                      Number       (%)         Number       (%)

(1) Relevant       46,667,903     4.68%    2,692,404      0.27%
securities
(2) Derivatives     3,727,660     0.37%      808,661      0.08%
(other than
options)
(3) Options and         3,206     0.00%      702,831      0.07%
agreements to
purchase/sell
Total              50,398,769     5.05%    4,203,896      0.42%


(b)  Interests and short positions in relevant securities of the company, other
     than the class dealt in (Note 3)

Class of                    Long                     Short
relevant
security:

                  Number              (%)   Number              (%)

(1) Relevant
securities

(2) Derivatives
(other than
options)

(3) Options and
agreements to
purchase/sell

Total


  (c)  Rights to subscribe (Note 3)

Class of relevant security:   Details



3.   DEALINGS (Note 4)

(a)  Purchases and sales

Purchase/sale      Number of Securities Price per unit
                                       (GBP)
Purchase           5,232               54.8588
Purchase           10,434              53.2129
Purchase           1,639               43.68
Purchase           230                 44.1677
Purchase           100                 51.64
Purchase           4,840               53.2077
Purchase           437                 52.96
Purchase           14,000              52.8114
Purchase           5,728               51.6201
Purchase           8,572               53.2091
Purchase           518                 54.65
Purchase           3,675               53.2082
Purchase           230                 44.1677
Purchase           130,297             52.5566
Purchase           584                 54.65
Purchase           247                 54.65
Purchase           1,224               54.65
Purchase           8,688               53.8873
Purchase           5,918               53.2089
Purchase           6,994               52.96
Purchase           335                 54.65
Purchase           623                 54.65
Purchase           342,214             54.8588
Purchase           1,540               54.65
Purchase           15,562              54.65
Purchase           1,946               53.2027
Purchase           1,514               54.65
Purchase           2,573               53.2026
Purchase           12,400              53.4246
Purchase           1,449               54.8589
Purchase           10,131              54.8588
Purchase           504                 53.2058
Purchase           4,483               53.2073
Purchase           24,135              54.8588
Purchase           886                 54.65
Purchase           4,693               54.8588
Purchase           4,857               54.8589
Purchase           3,043               54.8589
Purchase           18,250              54.8588
Purchase           8,380               54.8588
Purchase           11,874              54.65
Purchase           160,490             52.8568
Purchase           1,116               54.65
Purchase           200,000             52.9728
Purchase           583                 54.65
Purchase           1,170               54.65
Purchase           8,684               53.2103
Purchase           547                 53.2058
Purchase           770                 54.65
Purchase           37,675              54.65
Purchase           289,649             53.2119
Purchase           1,356               54.65
Purchase           10,619              54.8588
Purchase           2,009               54.65
Purchase           11,648              53.213
Purchase           3,144               53.2061
Purchase           409                 54.65
Purchase           119,634             53.2117
Purchase           1,660               54.65
Purchase           5,717               54.8589
Purchase           8,986               53.2113
Purchase           6,991               54.8588
Purchase           4,112               53.2072
Purchase           2,658               54.65
Purchase           10,260              54.8588
Purchase           20,428              53.2118
Purchase           478                 54.65
Purchase           5,297               54.8588
Purchase           100,841             43.5
Purchase           483                 53.2058
Purchase           7,092               53.2091
Purchase           66,592              54.8588
Purchase           8,557               53.2089
Purchase           91,277              53.2116
Purchase           3,928               54.8589
Purchase           8,800               54.8588
Purchase           68,889              43.5
Purchase           939                 54.65
Purchase           3,973               53.2078
Purchase           2,298               54.8589
Purchase           107,847             54.8588
Purchase           433                 54.65
Purchase           1,390               53.2058
Purchase           1,130               54.65
Purchase           4,489               53.2081
Purchase           238                 44.1677
Purchase           12,760              53.2123
Purchase           109                 54.9
Purchase           969                 54.65
Purchase           1,611               53.2058
Purchase           922                 54.65
Purchase           1,683               54.8588
Purchase           13,992              54.8588
Purchase           1,901               53.202
Purchase           253                 54.65
Purchase           630                 54.65
Purchase           2,248               54.8588
Purchase           40,000              52.1423
Purchase           23,000              45.1899
Purchase           3,712               54.8589
Purchase           3,366               54.9003
Purchase           13,760              54.8588
Purchase           3,326               53.206
Purchase           7,332               54.65
Purchase           15,077              54.8588
Purchase           91,000              49.602
Purchase           4,429               53.2084
Purchase           12,326              54.8588
Purchase           1,114               54.65
Purchase           56,363              53.2115
Purchase           536                 54.65
Purchase           7,959               53.3406
Purchase           4,341               54.8588
Purchase           528                 54.8592
Purchase           983                 54.859
Purchase           4,785               53.2076
Purchase           15                  43.6873
Purchase           1,277               54.859
Purchase           11,843              53.2131
Purchase           200,000             52.9728
Purchase           15,447              53.2124
Purchase           501                 54.8592
Purchase           6,798               53.2091
Purchase           4,393               52.96
Purchase           141,345             54.8588
Purchase           92                  43.5
Purchase           8,031               54.8588
Purchase           278                 44.2314
Purchase           576                 54.65
Purchase           375                 54.65
Purchase           10,110              54.8588
Purchase           3,393               54.8588
Purchase           7,449               53.2093
Purchase           5,656               54.8588
Purchase           5,304               54.8588
Purchase           2,871               53.2047
Sale               95                  53.45
Sale               40                  52.7
Sale               60                  53.7567
Sale               60                  52.7
Sale               158                 55.7
Sale               100                 52.7
Sale               65                  56.99
Sale               100                 56.43
Sale               200                 53.7566
Sale               100                 56.4
Sale               50                  52.7
Sale               80                  56.4
Sale               100                 53.39
Sale               100                 56.4
Sale               75                  56.4
Sale               100                 52.7
Sale               75                  53.45
Sale               150                 52.7
Sale               60                  52.7
Sale               100                 53.49
Sale               400                 55.7
Sale               90                  53.7566
Sale               50                  53.7566
Sale               100                 53.7566
Sale               650                 53.37
Sale               100                 53.7566
Sale               80                  52.7
Sale               65                  53.7566
Sale               300                 53.7566
Sale               75                  53.7565
Sale               10,722              45.3703
Sale               25                  52.8536
Sale               65                  52.7
Sale               50                  55.7
Sale               75                  56.4
Sale               40                  53.685
Sale               50                  56.4
Sale               2,251               43.68
Sale               200                 56.4
Sale               100                 56.4
Sale               100                 53.7566
Sale               100                 53.7566
Sale               60                  52.7
Sale               15,810              45.3052
Sale               50                  53.7566
Sale               75                  52.7
Sale               100                 56.4
Sale               50                  56.4
Sale               150                 56.4
Sale               80                  52.7
Sale               100                 53.7566
Sale               30                  55.0237
Sale               115                 52.7
Sale               50                  53.7566
Sale               100                 53.7566
Sale               255,458             43.5
Sale               90                  54.75
Sale               61                  53.7566
Sale               52,759              49.1207
Sale               175                 52.565
Sale               85                  53.7566
Sale               200                 56.4
Sale               124                 43.97
Sale               100                 56.4
Sale               80                  52.7
Sale               55                  55.1125
Sale               95                  54.4913
Sale               100                 55.1125
Sale               350                 52.6837
Sale               135                 54.9062
Sale               150                 54.4913
Sale               100                 53.37
Sale               100                 56.99
Sale               100                 54.765
Sale               63                  53.7567
Sale               25,637              43.5
Sale               100                 53.7566
Sale               100                 56.4
Sale               75                  56.4
Sale               50                  53.7566
Sale               50                  53.7566
Sale               75                  52.7
Sale               75                  53.7565
Sale               75                  53.7565
Sale               75                  53.6851
Sale               100                 56.4
Sale               8,579               43.5
Sale               125                 53.7566
Sale               641,386             54.8915
Sale               50                  53.7566
Sale               1,710               44.1884
Sale               125                 53.7566
Sale               175                 53.7566
Sale               245                 54.8637
Sale               45                  52.8538
Sale               125                 55.7
Sale               75                  55.7
Sale               80                  53.7566
Sale               160                 53.7566
Sale               80                  54.75
Sale               200                 53.7566
Sale               95                  54.4913
Sale               70                  52.37
Sale               65                  52.37
Sale               100                 53.7566
Sale               60                  53.7567
Sale               75                  56.4
Sale               93                  52.7
Sale               250                 54.9812
Sale               125                 53.7566
Sale               60                  53.7567
Sale               75                  52.7
Sale               575                 53.7566
Sale               102                 53.7566
Sale               75                  56.4
Sale               100                 52.7
Sale               100                 56.4
Sale               75                  53.7565
Sale               60                  53.7567
Sale               50                  56.4
Sale               130                 53.37
Sale               75                  52.37
Sale               100                 53.7566
Sale               250                 53.7566
Sale               113,580             43.5
Sale               120                 54.75
Sale               625                 53.7566
Sale               75                  53.7565
Sale               70                  52.7
Sale               100                 53.7566
Sale               14,000              52.756
Sale               165                 52.7
Sale               100                 56.4
Sale               100                 56.4
Sale               75                  56.99
Sale               750                 56.4
Sale               155                 55.7
Sale               200                 53.37
Sale               200                 53.37
Sale               50                  56.4
Sale               180                 53.7566
Sale               28                  52.7
Sale               50                  53.7566
Sale               250                 56.4
Sale               50                  53.7566
Sale               100                 56.4
Sale               50                  53.7566
Sale               500                 55.7
Sale               100                 53.37
Sale               150                 53.7566
Sale               250                 53.37
Sale               75                  56.4
Sale               25                  53.6852
Sale               25                  53.7736
Sale               50                  44.7748
Sale               200                 53.49
Sale               75                  56.4
Sale               150                 56.4
Sale               100                 53.7566
Sale               250                 55.7
Sale               100                 52.7
Sale               95                  53.45
Sale               50                  53.39
Sale               45                  56.4
Sale               100                 53.7566
Sale               175                 53.7566
Sale               39,600              43.5
Sale               200                 56.4
Sale               40                  54.75
Sale               100                 56.4
Sale               100                 53.7566
Sale               200                 53.7566
Sale               100                 54.4913
Sale               75                  56.4
Sale               85                  53.7566
Sale               50                  53.7566
Sale               60                  54.4913
Sale               95                  53.45
Sale               100                 53.7566
Sale               100                 56.4
Sale               75                  53.7565
Sale               275                 53.49
Sale               100                 56.4
Sale               90                  54.4913
Sale               285                 55.7
Sale               100                 56.4
Sale               75                  56.4
Sale               60                  52.7
Sale               100                 56.4
Sale               700                 55.7287
Sale               100                 52.7
Sale               55                  52.7
Sale               50                  56.4
Sale               75                  53.7565
Sale               150                 54.7625
Sale               313                 53.7566
Sale               95                  54.4913
Sale               75                  53.7565
Sale               75                  53.49
Sale               50                  52.7
Sale               170                 52.7
Sale               78,207              43.5
Sale               100                 53.7566
Sale               372                 Transfer
Sale               75                  56.99
Sale               100                 56.4
Sale               75                  56.99
Sale               100                 56.4
Sale               60                  52.7
Sale               1,500               54.82
Sale               75                  53.7565
Sale               60                  52.37
Sale               50                  54.75
Sale               400                 55.7
Sale               315                 53.7566
Sale               50                  53.7566
Sale               130                 53.4912
Sale               59,000              43.5
Sale               450                 53.85
Sale               50                  53.7566
Sale               1,575               53.7566
Sale               100                 54.75
Sale               50                  53.7566
Sale               100                 53.7566
Sale               100                 56.4
Sale               700                 54.82
Sale               80                  52.7
Sale               77                  44.1075
Sale               350                 54.82
Sale               100                 53.7566
Sale               100                 56.4
Sale               125                 53.7566
Sale               95                  53.45
Sale               100                 53.7566
Sale               50                  56.4
Sale               500                 53.49
Sale               100,841             43.5
Sale               100                 56.4
Sale               175                 53.7566
Sale               60                  53.7567
Sale               400                 55.7
Sale               80                  56.99
Sale               50                  55.1126
Sale               500                 52.8625
Sale               60                  52.7
Sale               135                 53.7566
Sale               75                  56.4
Sale               100                 53.39
Sale               100                 51.46
Sale               160                 53.7566
Sale               80                  53.7566
Sale               100                 53.7566
Sale               175                 53.7566
Sale               80                  52.7
Sale               150                 56.4
Sale               125                 55.7
Sale               20,498              43.5
Sale               85                  53.7566
Sale               280                 54.9062
Sale               100                 56.4
Sale               50                  53.7566
Sale               175                 54.4913
Sale               300                 55.17
Sale               36                  52.7
Sale               150                 54.4913
Sale               135                 56.3
Sale               75                  56.4
Sale               75                  56.4
Sale               80                  52.7
Sale               1,100               52.78
Sale               95                  54.4913
Sale               110                 53.7566
Sale               150                 54.8137
Sale               150                 56.4
Sale               66                  56.99
Sale               65                  53.7566
Sale               63                  53.7567
Sale               70                  53.7566
Sale               89,767              55.6443
Sale               70                  52.7
Sale               75                  56.4
Sale               100                 56.4
Sale               81                  53.7565
Sale               75                  53.7565
Sale               50                  56.4
Sale               95                  53.45
Sale               60                  52.7
Sale               100                 53.7566
Sale               100                 53.7566
Sale               100                 56.99
Sale               50                  56.4
Sale               75                  53.7565
Sale               100                 56.4
Sale               90                  52.7
Sale               50                  53.7566
Sale               130                 52.7
Sale               65                  53.7566
Sale               250                 53.685
Sale               98                  53.7566
Sale               50                  52.7
Sale               65                  53.7566
Sale               50                  53.685
Sale               75                  56.99
Sale               75                  53.7565
Sale               60                  52.7
Sale               440                 55.17
Sale               50                  52.7
Sale               54,073              53.0479
Sale               400                 55.7
Sale               40                  54.75
Sale               50                  56.4
Sale               400                 56.4
Sale               100                 53.7566
Sale               200,000             52.9728
Sale               60                  53.7567
Sale               150                 53.7566
Sale               50                  52.7
Sale               100                 53.7566
Sale               450                 55.68
Sale               73                  56.4
Sale               45                  52.7
Sale               365                 53.7566
Sale               90                  52.7
Sale               225                 53.7566
Sale               75                  54.4913
Sale               60                  52.7
Sale               125                 56.4
Sale               75                  56.99
Sale               230                 45.23
Sale               100                 53.7566
Sale               200                 55.17
Sale               100                 55.7
Sale               56                  52.7
Sale               100                 53.7566
Sale               70                  53.7566
Sale               200                 52.7
Sale               15                  54.9907
Sale               100                 56.4
Sale               10,500              54.4
Sale               75                  53.7565
Sale               60                  56.4
Sale               125                 55.7
Sale               102                 56.4
Sale               25                  53.6852
Sale               200                 53.7566
Sale               37,640              55.6704
Sale               100                 53.37
Sale               500                 44.1406
Sale               95                  54.4913
Sale               80                  56.99
Sale               92                  43.5
Sale               700                 54.82
Sale               68,889              43.5
Sale               75                  53.7565
Sale               50                  53.39
Sale               95                  54.4913
Sale               60                  52.7
Sale               75                  56.4
Sale               65                  53.9
Sale               125                 56.4
Sale               175                 53.7566
Sale               500                 44.1406
Sale               177                 44.54
Sale               70                  52.37
Sale               100                 53.7566
Sale               100                 56.4
Sale               50                  56.4
Sale               50                  54.75
Sale               75                  55.7
Sale               50                  53.39
Sale               95                  53.45
Sale               153                 55.3012
Sale               200                 55.17
Sale               65                  53.7566
Sale               115                 52.7
Sale               200                 55.17
Sale               80                  53.7566
Sale               950                 53.45
Sale               150                 53.685
Sale               221                 54.8232
Sale               420                 54.8562
Sale               45                  52.7
Sale               60                  53.685
Sale               5,000               54.4
Sale               100                 53.7566
Sale               65                  52.7
Sale               95                  53.9
Sale               85                  53.7566
Sale               95                  54.4913
Sale               70                  53.7566
Sale               80                  53.34
Sale               50                  53.7566
Sale               75                  53.7565
Sale               132                 56.4
Sale               270                 53.7566
Sale               65                  52.37
Sale               75                  53.7565
Sale               40                  54.75
Sale               153                 55.1825
Sale               198                 53.9
Sale               270                 54.8962
Sale               100                 56.4
Sale               65                  52.37
Sale               50                  53.7566
Sale               100                 52.7
Sale               21                  52.8538
Sale               50                  53.7566
Sale               200                 53.39
Sale               100                 53.7566
Sale               75                  56.4
Sale               130                 52.7
Sale               200                 53.7566
Sale               375                 53.7566
Sale               100                 56.4
Sale               150                 53.7566
Sale               50                  56.4
Sale               200                 56.4
Sale               50                  52.5862
Sale               76,328              43.5
Sale               50                  55.3126
Sale               84                  53.7565
Sale               75                  56.4
Sale               75                  53.7565
Sale               75                  54.6
Sale               100                 53.955
Sale               180                 52.7
Sale               75                  53.7565
Sale               75                  53.7565


NB: The below transactions which were previously disclosed have been cancelled
Deal Date        Purchase/Sale        Number of Securities       Price per unit (GBP)
08/11/2007       Sale                 50                         52.7000

(b)  Derivatives transactions (other than options)
Product name   Long/Short    Number of     Price per
                             Securities    unit
CFD            Short         15            43.6873
CFD            Short         23000         45.1899
CFD            Short         5728          51.6201
CFD            Short         100           51.64
CFD            Short         130297        52.5565
CFD            Short         14000         52.8113
CFD            Short         160490        52.8567
CFD            Short         200000        52.9728
CFD            Short         7959          53.3405
CFD            Short         8688          53.8872
CFD            Long          15810         45.3052
CFD            Long          10722         45.3703
CFD            Long          52759         49.1206
CFD            Long          14000         52.756
CFD            Long          1100          52.78
CFD            Long          11570         53.3325
CFD            Long          51250         53.4246
CFD            Long          221           54.8231
CFD            Long          641386        54.8915
CFD            Long          15            54.9906
CFD            Long          29479         55.3393
CFD            Long          37640         55.6704

(c)  Options transactions in respect of existing securities

(i)  Writing, selling, purchasing or varying

Product name,   Writing,          Number of          Exercise  Type, e.g.      Expiry   Option money
e.g. call       selling,          securities to      price     American,       date     paid/received
option          purchasing,       which the option             European etc.            per unit (GBP)
                varying etc.      relates (GBP)


(ii) Exercising

Product name, e.g.  Number of           Exercise price per
call option         securities          unit (Note 5)




(d)  Other dealings (including new securities) (Note 4)


Nature of transaction Details           Price per unit
(Note 8)                                (if applicable)
                                        (Note 5)




4.   OTHER INFORMATION
None

Agreements, arrangements or understandings relating to options or derivatives


Full details of any agreement, arrangement or understanding between the
person disclosing and any other person relating to the voting rights of
any relevant securities under any option referred to on this form or
relating to the voting rights or future acquisition or disposal of any
relevant securities to which any derivative referred to on this form is
referenced.  If none, this should be stated.




Is a Supplemental Form 8 attached? (Note 9)                 YES


Date of disclosure                         09 November 2007
Contact name                               BARCLAYS COMPLIANCE
Telephone number                           020 7116 2913
If a connected EFM, name of
offeree/offeror with which connected
If a connected EFM, state nature of
connection (Note 10)

SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate)

OPEN POSITIONS (Note 1)
Product name,     Written or  Number of securities   Exercise price   Type, e.g.     Expiry date
e.g. call option  purchased   to which the option    (Note 2)         American,
                              or derivative relates                   European etc.
Option            Purchased   125                    4,400.0000 EURO 20/06/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -1,000                 3,500.0000       EURO           21/12/2007
Option            Purchased   -500                   4,400.0000       EURO           21/12/2007
Option            Purchased   -306                   4,200.0000       EURO           21/12/2007
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   4,200.0000       EURO           16/11/2007
Option            Purchased   -600,000               42.0000          AMER           21/12/2007
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   500                    5,200.0000       EURO           21/12/2007
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,300.0000       EURO           21/12/2007
Option            Purchased   250                    4,500.0000       EURO           21/12/2007
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   306                    4,800.0000       EURO           21/12/2007
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   450                    3,500.0000       EURO           21/12/2007
Option            Purchased   -225                   4,500.0000       EURO           16/11/2007
Notes

1. Where there are open option positions or open derivative positions (except for CFDs), full details should be given.
Full details of any  existing agreements to purchase or to sell  should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover
Panel's website at www.thetakeoverpanel.org.uk