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               07 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      49,952,471       5.01%    1,002,701      0.10%
securities
(2) Derivatives    2,432,682       0.24%       125,583     0.01%
(other than
options)
(3) Options and      202,500       0.02%       701,200     0.07%
agreements to
purchase/sell
Total              52,587,653      5.27%      1,829,484    0.18%


(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      5,779                50.1298
Purchase      13,094               51.7061
Purchase      359                  51.8121
Purchase      16,859               50.7307
Purchase      10,740               51.7367
Purchase      4,442                55.2674
Purchase      4,647                50.3200
Purchase      59,148               50.4123
Purchase      486                  51.7000
Purchase      200                  51.5585
Purchase      27,542               50.2012
Purchase      1,743                50.3200
Purchase      100                  51.2384
Purchase      44,590               51.0674
Purchase      44,590               51.0674
Purchase      503                  51.7367
Purchase      35,447               52.5500
Purchase      19,000               50.0100
Purchase      13,700               50.3291
Purchase      19,000               50.0100
Purchase      3,483                50.7989
Purchase      11,350               51.2585
Purchase      18,803               52.1500
Purchase      200                  51.5585
Purchase      400                  51.9261
Purchase      400                  51.9261
Purchase      1,208                51.5337
Purchase      1,010                50.0838
Purchase      2,142                50.7530
Purchase      7,401                50.4425
Purchase      1,842                50.3200
Purchase      1,571                51.6204
Purchase      1,392                50.9637
Purchase      4,429                50.3200
Purchase      50                   51.2384
Purchase      576                  51.5200
Sale          100                  51.5300
Sale          1,392                50.9560
Sale          100                  51.5300
Sale          359                  51.8043
Sale          75                   51.5300
Sale          7,401                50.4425
Sale          70,000               52.0000
Sale          75                   51.5300
Sale          100                  51.5300
Sale          8,700                51.0584
Sale          11,350               51.2539
Sale          94                   50.8816
Sale          50                   51.5300
Sale          150                  51.5300
Sale          12                   54.3350
Sale          19,000               50.0100
Sale          75                   51.5300
Sale          13,700               50.3200
Sale          59,148               50.4123
Sale          50                   51.5300
Sale          200                  51.5585
Sale          400                  51.9261
Sale          12                   51.6000
Sale          4,442                55.2674
Sale          50                   51.5300
Sale          125                  51.5300
Sale          1,010                50.0838
Sale          70                   51.5076
Sale          13,094               51.7061
Sale          2,142                50.7530
Sale          27,542               50.1922
Sale          100                  51.5300
Sale          1,571                51.6204
Sale          50                   51.5300
Sale          5,779                50.1248
Sale          59,148               50.4123
Sale          3,483                50.7938
Sale          1,208                51.5290
Sale          2,139                50.3200
Sale          50                   51.5300
Sale          75                   51.5300
Sale          1,010                50.0838
Sale          4,060                Transfer
Sale          18,803               52.1500
Sale          75                   51.5300
Sale          44,590               51.0674
Sale          16,859               50.7307
Sale          2,142                50.7530

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         13700         50.329
CFD            Short         3483          50.7988
CFD            Short         1392          50.9636
CFD            Short         865           51.0447
CFD            Short         10485         51.2761
CFD            Short         200           51.5585
CFD            Short         1571          51.6203
CFD            Short         13094         51.706
CFD            Short         400           51.9261
CFD            Long          1010          50.0838
CFD            Long          5779          50.1247
CFD            Long          27542         50.1921
CFD            Long          7401          50.4425
CFD            Long          16859         50.7306
CFD            Long          2142          50.753
CFD            Long          1208          51.529
CFD            Long          359           51.8042

(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)

Call            Purchase              500             56.00      Euro           15/02/2008       .81
Call            Sale                  400             56.00      Euro           18/01/2008       .65


(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                         08 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   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   -400                   5,600.0000       EURO           18/01/2008
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   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   -300,000               52.0000          AMER           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   200,000                60.0000          AMER           18/01/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
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