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               17 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      50,402,304     5.05%       857,228       0.09%
securities
(2) Derivatives    2,349,763     0.24%       112,728       0.01%
(other than
options)
(3) Options and      202,500     0.02%       701,200       0.07%
agreements to
purchase/sell
Total              52,954,567    5.31%     1,671,156       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      210                  45.5875
Purchase      4,329                45.0325
Purchase      27,000               47.1325
Purchase      275                  46.1000
Purchase      47,667               45.3278
Purchase      139                  44.7900
Purchase      73,025               44.7900
Purchase      18,930               45.6286
Purchase      22,200               45.2018
Purchase      1,634                44.7900
Purchase      383                  44.8190
Purchase      56,870               46.4494
Purchase      4,575                45.0255
Purchase      321                  44.7391
Purchase      1,512                44.7900
Purchase      55,720               45.6448
Purchase      241                  44.7900
Purchase      2,000                45.2135
Purchase      20,125               45.2113
Purchase      13,443               45.3567
Purchase      13,688               47.0943
Purchase      3,484                44.8074
Purchase      6,948                44.7391
Purchase      1,446                46.3800
Purchase      1,280                47.0025
Purchase      2,000                45.2135
Purchase      1,019                47.2023
Purchase      4,980                44.7981
Purchase      9,947                45.2441
Purchase      6,401                45.0379
Purchase      1,446                46.3800
Purchase      6,534                44.7511
Purchase      2,229                44.7829
Purchase      55,720               45.6448
Purchase      49,200               46.2613
Sale          4,980                44.7900
Sale          3,684                44.7900
Sale          12,600               44.7900
Sale          4,329                45.0325
Sale          56,870               46.4494
Sale          2,000                45.2135
Sale          18,930               45.6245
Sale          1,094                45.5800
Sale          20,125               45.2113
Sale          47,667               45.3278
Sale          55,720               45.6448
Sale          25                   45.1300
Sale          2,229                44.7829
Sale          3,484                44.8029
Sale          2,520                44.7900
Sale          4,329                45.0325
Sale          47,667               45.3278
Sale          6,534                44.7511
Sale          1,446                46.3800
Sale          6,401                45.0298
Sale          728                  48.0950
Sale          250                  45.6250
Sale          27,000               47.1325
Sale          22,200               45.2018
Sale          9,947                45.2441
Sale          90                   45.2548
Sale          383                  44.8190
Sale          4,575                45.0210
Sale          13,688               47.0943
Sale          1,280                46.9955
Sale          2,229                44.7829
Sale          100                  62.5000 EUR
Sale          13,443               45.3526
Sale          305                  46.0225
Sale          383                  44.8190

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         4980          44.798
CFD            Short         3484          44.8074
CFD            Short         20125         45.2113
CFD            Short         2000          45.2135
CFD            Short         3769          45.2472
CFD            Short         9674          45.3993
CFD            Short         1446          46.38
CFD            Short         218           46.95
CFD            Short         13688         47.0942
CFD            Long          6534          44.7511
CFD            Long          2229          44.7828
CFD            Long          4575          45.021
CFD            Long          6401          45.0298
CFD            Long          4329          45.0324
CFD            Long          9947          45.244
CFD            Long          9270          45.3207
CFD            Long          9660          45.9159
CFD            Long          1280          46.9954

(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                         18 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   -400                   5,600.0000       EURO           18/01/2008
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   200,000                60.0000          AMER           18/01/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       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   500                    5,600.0000       EURO           15/02/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008

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