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               09 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       46,320,952     4.65%    2,902,226      0.29%
securities
(2) Derivatives     4,173,570     0.42%    1,047,661      0.11%
(other than
options)
(3) Options and         3,206     0.00%      702,831      0.07%
agreements to
purchase/sell
Total              50,497,728     5.06%    4,652,718      0.47%


(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           Price per unit
                   Securities          (GBP)
Purchase           200,000             56.0701
Purchase           4,849               56.3969
Purchase           1,237               56.9984
Purchase           400                 57.2897
Purchase           5,605               55.8458
Purchase           7,723               56.3506
Purchase           200,000             56.0701
Purchase           1,900               56.3498
Purchase           53,000              56.3868
Purchase           6,074               55.7983
Purchase           3,148               56.24
Purchase           16,573              56.9287
Purchase           2,184               56.7622
Purchase           2,625               57.0767
Purchase           65,195              56.7622
Purchase           377                 45.6468
Sale               80                  57.265
Sale               4,907               55.6118
Sale               100                 57.54
Sale               140                 56.48
Sale               100                 57.5412
Sale               150                 57.6
Sale               100                 57.6
Sale               70                  57.6
Sale               150                 56.48
Sale               400                 56.48
Sale               300                 56.48
Sale               275                 56.48
Sale               178                 56.35
Sale               210                 56.48
Sale               120                 57.5062
Sale               50                  57.54
Sale               50                  56.9826
Sale               120                 57.6
Sale               120                 56.48
Sale               50                  56.47
Sale               100                 56.48
Sale               200                 57.6
Sale               150                 56.48
Sale               75                  57.6
Sale               2,916               56.71
Sale               180                 56.6812
Sale               50                  57.4912
Sale               250                 57.6
Sale               1,837               56.71
Sale               135                 56.48
Sale               100                 56.48
Sale               23                  Transfer
Sale               230                 56.48
Sale               270                 56.48
Sale               300                 56.48
Sale               200                 56.48
Sale               135                 56.48
Sale               200                 56.48
Sale               60                  57.6
Sale               135                 57.6
Sale               250                 56.48
Sale               300                 56.48
Sale               265                 56.48
Sale               74                  57.6
Sale               200                 56.48
Sale               245                 56.48
Sale               157                 56.48
Sale               120                 56.48
Sale               88,048              56.3463
Sale               150                 56.6137
Sale               130                 57.6
Sale               125                 57.6
Sale               290                 57.6
Sale               150                 56.48
Sale               100                 56.48
Sale               320,600             56.3892
Sale               170                 56.48
Sale               100                 57.6
Sale               185                 57.6
Sale               56                  57.0138
Sale               140                 56.48
Sale               170                 56.48
Sale               280                 56.48
Sale               180                 56.48
Sale               100                 57.54
Sale               110                 56.48
Sale               200                 57.6
Sale               130                 57.6
Sale               220                 56.48
Sale               125                 57.6
Sale               200                 56.48
Sale               180                 56.48
Sale               150,000             56.3534
Sale               200                 56.48
Sale               2,896               56.7
Sale               125                 56.7062
Sale               54                  56.48
Sale               200                 56.48
Sale               100                 57.6
Sale               50                  57.6
Sale               250                 57.6
Sale               250                 56.48
Sale               199                 57.6
Sale               110                 56.48
Sale               222                 57.6
Sale               137                 56.48
Sale               75                  57.6
Sale               75                  57.6
Sale               202                 56.48
Sale               195                 56.48
Sale               150                 57.6
Sale               300                 57.54
Sale               12,654              55.1913
Sale               105                 56.48
Sale               500                 56.48
Sale               70                  57.6
Sale               65                  56.48
Sale               180                 57.6
Sale               500                 56.48
Sale               100                 54
Sale               150                 57.6
Sale               150                 57.6
Sale               175                 56.48
Sale               169                 57.6
Sale               150                 57.6
Sale               125                 57.6
Sale               88                  57.6
Sale               110                 56.7537
Sale               23                  Transfer
Sale               370                 56.48
Sale               17,969              56.24
Sale               350                 56.48
Sale               150                 56.48
Sale               100                 57.6
Sale               8,525               56.2436
Sale               100                 57.6
Sale               100                 56.0087
Sale               160                 54.6975
Sale               125                 57.6
Sale               250                 56.48
Sale               530                 56.6812
Sale               11,176              56.6371
Sale               400                 56.48
Sale               22                  57.0452
Sale               175                 56.48
Sale               99                  56.35
Sale               320                 56.48
Sale               360                 56.48
Sale               350                 56.48
Sale               120                 56.48
Sale               5,238               56.4003
Sale               148                 56.48
Sale               150                 57.6
Sale               200                 56.48
Sale               185                 56.48
Sale               160                 56.48
Sale               275                 57.6
Sale               195                 57.6
Sale               235                 56.48
Sale               165                 56.48
Sale               100                 57.0412
Sale               150                 56.48
Sale               130                 57.6
Sale               300                 56.48
Sale               250                 56.48
Sale               350                 56.48
Sale               377                 45.6468
Sale               16                  56.0152
Sale               100                 57.5412
Sale               55                  57.54
Sale               140                 56.48
Sale               117                 56.48
Sale               250                 56.48
Sale               80                  57.335
Sale               200                 56.7075
Sale               250                 57.6
Sale               100                 56.48
Sale               2,015               56.9213
Sale               46                  57.6
Sale               69                  57.4424
Sale               200                 57.6
Sale               200                 56.48
Sale               175                 57.6
Sale               205                 56.48
Sale               150                 57.6
Sale               300                 56.48
Sale               130                 57.6
Sale               150                 56.48
Sale               135                 57.6
Sale               71                  56.48
Sale               200                 57.5412
Sale               300                 56.48
Sale               377                 57.94
Sale               230                 56.48
Sale               24,480              56.79
Sale               210                 56.48
Sale               165                 54.6975
Sale               150                 56.48
Sale               110                 57.6
Sale               140                 57.6
Sale               160                 56.48
Sale               150                 56.48
Sale               170                 57.6
Sale               110                 57.6
Sale               150                 56.48
Sale               100                 56.48
Sale               130                 56.48
Sale               15,000              56.8035
Sale               150                 56.48
Sale               170                 56.48
Sale               200                 57.6
Sale               150                 57.6
Sale               127                 56.48
Sale               147                 57.6
Sale               175                 56.48
Sale               120                 57.6
Sale               230                 56.48
Sale               250                 56.48
Sale               104                 57.6
Sale               26                  56.48
Sale               250                 57.6
Sale               160                 57.6
Sale               200                 56.48
Sale               140                 57.6
Sale               175                 57.6
Sale               250                 56.48
Sale               200,000             56.0701
Sale               150                 56.48
Sale               150                 56.48
Sale               10,852              56.2302
Sale               200                 56.48
Sale               5,400               Transfer
Sale               150                 56.48



(b)  Derivatives transactions (other than options)
Product name   Long/Short    Number of     Price per
                             Securities    unit
CFD            Short         6074          55.7982
CFD            Short         5605          55.8457
CFD            Short         200000        56.0701
CFD            Short         7723          56.3505
CFD            Short         16573         56.9287
CFD            Short         2625          57.0766
CFD            Short         350           57.2896
CFD            Short         50            57.2898
CFD            Long          12654         55.1913
CFD            Long          4907          55.6117
CFD            Long          8525          56.2436
CFD            Long          88048         56.3462
CFD            Long          320600        56.3892
CFD            Long          11176         56.637

(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                         12 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   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -250                   4,200.0000       EURO           16/11/2007
Option            Purchased   -225                   4,500.0000       EURO           16/11/2007
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,300.0000       EURO           21/12/2007
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   306                    4,800.0000       EURO           21/12/2007
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   450                    3,500.0000       EURO           21/12/2007
Option            Purchased   500                    5,200.0000       EURO           21/12/2007
Option            Purchased   -600,000               42.0000          AMER           21/12/2007
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   250                    4,500.0000       EURO           21/12/2007

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