Rule 8.3 - RIO TINTO PLC

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               22 January 2008

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      50,355,403      5.05%      840,328       0.08%
securities
(2) Derivatives    2,355,496      0.24%      143,383       0.01%
(other than
options)
(3) Options and        2,500      0.00%      700,800       0.07%
agreements to
purchase/sell
Total             52,713,399      5.29%    1,684,511       0.17%


(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           289,840             42.1452
Purchase           1                   42.95
Purchase           3,110               42.1243
Purchase           300,000             42.9047
Purchase           2,655               39.968
Purchase           2,250               41.0884
Purchase           157                 42.59
Purchase           2,774               42.95
Purchase           2,000               41.49
Purchase           44,221              42.2676
Purchase           18,586              42.0495
Purchase           6,955               40.9541
Purchase           41,552              40.8113
Purchase           275                 41.3649
Purchase           327                 41.3528
Purchase           22                  Transfer
Purchase           24                  41.3528
Purchase           218                 41.6
Purchase           44,841              41.2624
Purchase           296                 42.95
Purchase           111                 40.15
Purchase           300,000             42.9047
Purchase           724                 41.19
Purchase           78                  41.45
Purchase           16                  41.44
Purchase           393,021             41.9718
Purchase           350                 41.55
Purchase           13,766              41.2627
Purchase           15,763              42.95
Purchase           14,470              41.1813
Purchase           1,025               41.3649
Purchase           222,041             42.2277
Purchase           200                 40.81
Purchase           170,509             41.6334
Purchase           1,200               41.22
Purchase           5,500               41.17
Purchase           170,509             41.6334
Purchase           104                 42.59
Purchase           100                 41.33
Purchase           523                 42.95
Purchase           590                 42.95
Purchase           66                  43.04
Purchase           13,844              41.2638
Purchase           10,851              41.0256
Purchase           430                 42.95
Sale               479                 40.4
Sale               760                 40.4
Sale               2,358               40.4
Sale               142                 40.4
Sale               497                 40.4
Sale               587                 40.4
Sale               51                  40.4
Sale               41                  40.4
Sale               64                  40.4
Sale               144                 40.4
Sale               634                 40.4
Sale               5,500               41.17
Sale               135                 41.93
Sale               336                 40.4
Sale               580                 40.4
Sale               245                 40.4
Sale               427                 40.4
Sale               194                 40.4
Sale               750                 40.4
Sale               267                 40.4
Sale               864                 40.4
Sale               65                  40.4
Sale               294                 40.4
Sale               568                 40.4
Sale               362                 42.95
Sale               456                 40.4
Sale               404                 40.4
Sale               124                 40.4
Sale               100                 41.52
Sale               94                  40.4
Sale               23                  40.4
Sale               169                 40.4
Sale               234                 40.4
Sale               14,470              41.1772
Sale               219                 40.4
Sale               192                 40.4
Sale               142                 40.4
Sale               44                  40.4
Sale               324                 40.4
Sale               289,840             42.1376
Sale               103                 40.4
Sale               194                 40.9
Sale               204                 40.4
Sale               342                 40.4
Sale               567                 40.4
Sale               157                 42.59
Sale               652                 40.4
Sale               86                  40.4
Sale               250                 40.4
Sale               224                 40.4
Sale               216                 40.4
Sale               276                 40.4
Sale               534                 40.4
Sale               292                 40.4
Sale               130                 40.4
Sale               300                 40.4
Sale               156                 40.4
Sale               98                  40.4
Sale               44,221              42.2676
Sale               316                 40.4
Sale               228                 40.4
Sale               550                 40.4
Sale               265                 40.4
Sale               120                 40.4
Sale               66                  43.04
Sale               83                  40.4
Sale               152                 40.4
Sale               16                  40.4
Sale               18,586              42.0419
Sale               317                 40.4
Sale               300,000             42.9047
Sale               406                 40.4
Sale               74                  40.4
Sale               756                 40.4
Sale               80                  40.4
Sale               360                 40.4
Sale               269                 40.4
Sale               6,955               40.9541
Sale               193                 40.4
Sale               709                 40.4
Sale               247                 40.4
Sale               515                 40.4
Sale               788                 40.4
Sale               124                 40.4
Sale               254                 40.4
Sale               241                 40.4
Sale               300                 40.4
Sale               181                 40.4
Sale               406                 40.4
Sale               416                 40.4
Sale               1                   42.95
Sale               252                 40.4
Sale               254                 40.4
Sale               20                  53.57 EUR
Sale               301                 40.4
Sale               1,879               40.4
Sale               240                 40.4
Sale               1,035               40.4
Sale               279                 40.4
Sale               1,777               40.4
Sale               443                 40.4
Sale               350                 40.4
Sale               590                 42.95
Sale               204                 40.4
Sale               3,110               42.1243
Sale               239                 40.53
Sale               509                 40.4
Sale               64                  40.4
Sale               346                 40.4
Sale               603                 40.4
Sale               330                 40.4
Sale               1,045               40.4
Sale               383                 40.4
Sale               24                  40.4
Sale               213                 40.4
Sale               13,766              41.2627
Sale               265                 40.4
Sale               136                 40.4
Sale               148                 40.4
Sale               162                 40.4
Sale               443                 40.4
Sale               198                 40.4
Sale               127                 40.4
Sale               947                 40.4
Sale               225                 40.4
Sale               362                 40.4
Sale               110                 40.4
Sale               250                 41.9
Sale               248                 40.4
Sale               1,802               40.4
Sale               218                 40.4
Sale               709                 40.4
Sale               129                 40.4
Sale               322                 40.4
Sale               346                 40.4
Sale               104                 42.59
Sale               91                  40.4
Sale               59                  40.4
Sale               547                 40.4
Sale               288                 40.4
Sale               372                 40.4
Sale               254                 40.4
Sale               232                 40.4
Sale               224                 40.4
Sale               100                 54.03 EUR
Sale               414                 40.4
Sale               245                 40.4
Sale               520                 40.4
Sale               323                 40.4
Sale               74                  40.4
Sale               336                 40.4
Sale               2,000               41.4838
Sale               372                 40.4
Sale               642                 40.4
Sale               256                 40.4
Sale               33                  40.4
Sale               10,851              41.0215
Sale               170,509             41.6334
Sale               449                 40.4
Sale               330                 40.4
Sale               335                 40.4
Sale               144                 40.4
Sale               343                 40.4
Sale               989                 40.4
Sale               100                 56.4 EUR
Sale               466                 40.4
Sale               160                 40.4
Sale               123                 40.4
Sale               54                  40.4
Sale               140                 40.4
Sale               2,250               41.0822
Sale               171                 40.4
Sale               350                 41.9
Sale               279                 40.4
Sale               130                 40.4
Sale               6                   40.4
Sale               30                  40.4
Sale               88                  40.4
Sale               65                  40.4
Sale               100                 56.01 EUR
Sale               181                 40.4
Sale               124                 40.4
Sale               87                  40.4
Sale               101                 40.4
Sale               70                  40.4
Sale               215                 40.4
Sale               13,373              41.1733
Sale               239                 40.4
Sale               144                 40.4
Sale               109                 40.4
Sale               96                  40.4
Sale               326                 40.4
Sale               1,331               40.4
Sale               1,073               40.4
Sale               173                 40.86
Sale               75                  40.4
Sale               190                 40.4
Sale               383                 40.4
Sale               356                 40.4
Sale               190                 40.4
Sale               44,841              41.2624
Sale               862                 40.4
Sale               393,021             41.9718
Sale               342                 40.4
Sale               253                 40.4
Sale               317                 40.4
Sale               299                 40.4
Sale               153                 40.4
Sale               347                 40.4
Sale               158                 40.4
Sale               437                 40.4
Sale               3,013               40.4
Sale               78                  40.4
Sale               195                 40.4
Sale               179                 40.4
Sale               134                 40.4
Sale               27                  40.84
Sale               683                 40.4
Sale               275                 40.4
Sale               168                 40.4
Sale               294                 40.4
Sale               85                  41.07
Sale               228                 40.4
Sale               271                 40.4
Sale               278                 40.4
Sale               606                 40.4
Sale               388                 40.4
Sale               128                 40.4
Sale               153                 40.4
Sale               353                 40.4
Sale               41,552              40.8113
Sale               380                 40.4
Sale               258                 40.4
Sale               161                 40.4
Sale               1,265               40.4
Sale               204                 40.4
Sale               100                 55.9 EUR
Sale               1,549               40.4
Sale               18                  40.4
Sale               78                  41.45
Sale               247                 40.4
Sale               792                 40.4
Sale               244                 40.4
Sale               100                 56.01 EUR
Sale               248                 40.4
Sale               222,041             42.2277
Sale               61                  40.4
Sale               143                 40.4
Sale               22                  Transfer
Sale               393,021             41.9718




(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         41552         40.8112
CFD            Short         2250          41.0883
CFD            Short         14470         41.1813
CFD            Short         7547          41.5953
CFD            Short         28287         41.6121
CFD            Short         8806          41.6387
CFD            Short         28066         41.6656
CFD            Short         18586         42.0494
CFD            Short         44221         42.2675
CFD            Short         300000        42.9046
CFD            Long          10851         41.0214
CFD            Long          59917         41.073
CFD            Long          44841         41.2624
CFD            Long          5889          41.2808
CFD            Long          252           41.3779
CFD            Long          2000          41.4837
CFD            Long          27381         41.6437
CFD            Long          709           41.677
CFD            Long          19960         41.7155
CFD            Long          3110          42.1242
CFD            Long          289840        42.1376


(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                         23 January 2008
Contact name                               Geoff Smith
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)


Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

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   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008



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