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               04 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      49,976,405       5.01%      926,745      0.09%
securities
(2) Derivatives    2,407,726       0.24%      117,737      0.01%
(other than
options)
(3) Options and      202,100       0.02%       700,800     0.07%
agreements to
purchase/sell
Total             52,586,231       5.27%      1,745,282    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      5,729                54.6045
Purchase      671                  52.1500
Purchase      245                  55.2491
Purchase      793                  53.8164
Purchase      40,175               53.5597
Purchase      580                  55.1415
Purchase      37,995               51.3917
Purchase      51,341               53.7434
Purchase      684                  55.2800
Purchase      3,995                54.5623
Purchase      7,526                55.2333
Purchase      11,439               52.7494
Purchase      4,767                54.1037
Purchase      42,239               54.9100
Purchase      3,983                52.1500
Purchase      10,601               53.4410
Purchase      140                  52.1750
Purchase      728                  52.1500
Purchase      27,000               55.2800
Purchase      368                  54.0002
Purchase      14,636               54.7135
Purchase      21,309               54.2773
Purchase      51,341               53.7434
Purchase      6,792                52.1500
Purchase      58,000               52.7379
Purchase      245                  55.2491
Purchase      14,078               52.1745
Purchase      6,072                54.3114
Purchase      66,210               53.0478
Purchase      14,665               53.7866
Purchase      580                  55.1415
Sale          11,439               52.7446
Sale          40,755               53.5822
Sale          242                  54.6600
Sale          21,309               54.2773
Sale          150                  52.6900
Sale          10,601               53.4410
Sale          793                  53.8083
Sale          14,665               53.7812
Sale          4,767                54.1037
Sale          245                  55.2491
Sale          96                   54.0300
Sale          684                  55.2800
Sale          14                   52.5775
Sale          4,767                54.1037
Sale          3,995                54.5573
Sale          580                  55.1415
Sale          200                  53.8875
Sale          5,729                54.6045
Sale          9                    54.3300
Sale          51,341               53.7434
Sale          300                  55.2600
Sale          38,801               55.0287
Sale          37,995               51.3917
Sale          70                   55.2476
Sale          95                   52.6900
Sale          14,636               54.7052
Sale          14,078               52.1651
Sale          27,000               55.2800
Sale          7,526                55.2333
Sale          6,072                54.3114
Sale          93                   53.0250
Sale          150                  55.2750
Sale          40,175               53.5597
Sale          58,000               52.7379

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         8519          52.5764
CFD            Short         2920          53.2539
CFD            Short         10601         53.441
CFD            Short         14665         53.7865
CFD            Short         212           53.8552
CFD            Short         274           54.6327
CFD            Short         14636         54.7134
CFD            Short         245           55.2491
CFD            Long          14078         52.165
CFD            Long          1340          53.6594
CFD            Long          793           53.8082
CFD            Long          4767          54.1037
CFD            Long          21309         54.2772
CFD            Long          2655          55.0104

(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                         07 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