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               02 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      49,619,857       4.98%    1,034,201      0.10%
securities
(2) Derivatives    2,364,935       0.24%      130,558      0.01%
(other than
options)
(3) Options and      202,100       0.02%      700,800      0.07%
agreements to
purchase/sell
Total             52,186,892       5.23%    1,865,559      0.19%


(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      13,568               53.1741
Purchase      3,444                53.0315
Purchase      400                  53.7089
Purchase      2,436                53.8157
Purchase      9,380                52.2211
Purchase      5,387                53.2212
Purchase      25,440               52.7674
Purchase      5,158                53.3948
Purchase      275                  53.8157
Purchase      13,568               53.1741
Purchase      317                  53.8157
Purchase      307                  53.8157
Purchase      2,056                52.5500
Purchase      2,760                53.0572
Purchase      400                  53.7089
Purchase      38                   52.9200
Purchase      15,000               52.5500
Purchase      2,612                52.9843
Purchase      4,429                52.5500
Purchase      20,988               53.0766
Purchase      284                  52.5500
Purchase      4,550                52.7716
Purchase      6,406                53.5450
Purchase      5,053                52.9288
Purchase      26,146               53.1394
Sale          4,550                52.7637
Sale          15,000               52.5500
Sale          400                  53.7089
Sale          5,387                53.2212
Sale          3,444                53.0315
Sale          5,158                53.3900
Sale          2,612                52.9795
Sale          2,760                53.0572
Sale          20,988               53.0766
Sale          220                  52.9700
Sale          75                   53.2851
Sale          26,146               53.1394
Sale          2,760                53.0572
Sale          13,568               53.1741
Sale          5,053                52.9288
Sale          60                   53.7125
Sale          9,380                52.2211
Sale          38                   52.9200
Sale          3,482                53.0303
Sale          26,146               53.1394
Sale          6,406                53.5450

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         578           52.7227
CFD            Short         4550          52.7716
CFD            Short         2034          53.0585
CFD            Short         60            53.4333
CFD            Short         6406          53.5449
CFD            Short         400           53.7089
CFD            Long          2760          53.0571
CFD            Long          20988         53.0766
CFD            Long          1572          53.1917
CFD            Long          3586          53.4768

(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                         03 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               56.0000          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   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               52.0000          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                    3,000.0000       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   100                    5,600.0000       EURO           18/01/2008
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