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               21 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      50,326,900     5.05%       871,403       0.09%
securities
(2) Derivatives     2,383,531    0.24%        95,743       0.01%
(other than
options)
(3) Options and         2,500    0.00%       700,800       0.07%
agreements to
purchase/sell
Total              52,712,931    5.29%      1,667,946      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      1,103                45.0700
Purchase      700                  44.1175
Purchase      63,473               43.1044
Purchase      58,672               43.0030
Purchase      9,855                38.8537
Purchase      4,989                43.4713
Purchase      500                  43.4000
Purchase      4,801                44.3430
Purchase      137                  43.4275
Purchase      39,646               44.0031
Purchase      445                  44.7475
Purchase      29,377               43.5225
Purchase      500                  42.7800
Purchase      1,702                42.2800
Purchase      87                   43.9900
Purchase      31,983               43.8085
Purchase      571                  43.7900
Purchase      18,139               43.4628
Purchase      500                  43.4020
Purchase      115                  43.6375
Purchase      101,277              43.8002
Purchase      110                  44.1025
Purchase      2,156                43.9374
Purchase      65,033               43.7381
Purchase      100                  42.8700
Purchase      2,940                43.5303
Purchase      4,989                43.4713
Purchase      11,787               43.9003
Purchase      64,533               43.7407
Purchase      43,454               43.8752
Purchase      271                  43.2342
Purchase      5,000                43.7100
Purchase      30                   58.5000 EUR
Sale          58,672               43.0030
Sale          16,874               43.8444
Sale          27                   43.0700
Sale          101,277              43.8002
Sale          18,139               43.4628
Sale          60                   43.4600
Sale          2,940                43.5260
Sale          500                  43.4000
Sale          991                  42.2800
Sale          2,156                43.9374
Sale          27                   43.4825
Sale          2,156                43.9374
Sale          271                  43.2277
Sale          29,377               43.5182
Sale          64,533               43.7407
Sale          31,983               43.8046
Sale          14                   43.7656
Sale          5,000                43.7100
Sale          132                  43.7900
Sale          9,855                38.8537
Sale          500                  43.4020
Sale          98                   45.1500
Sale          39,646               44.0031
Sale          4,989                43.4713
Sale          27                   43.3775
Sale          27                   42.8800
Sale          4,801                44.3430
Sale          11,787               43.9003
Sale          275                  46.0675
Sale          43,454               43.8713
Sale          101,777              43.7982
Sale          87                   43.9900

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         18139          43.4627
CFD            Short         4989           43.4713
CFD            Short         2940           43.5303
CFD            Short         43454          43.8752
CFD            Long          271            43.2277
CFD            Long          29377          43.5181
CFD            Long          1842           43.5206
CFD            Long          30141          43.8219
CFD            Long          2156           43.9373
CFD            Long          39646          44.003

(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                         22 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                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
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                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
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

 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