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               08 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      50,059,755       5.02%       998,933     0.10%
securities
(2) Derivatives    2,411,976       0.24%       127,833     0.01%
(other than
options)
(3) Options and      202,500       0.02%       701,200     0.07%
agreements to
purchase/sell
Total              52,674,231      5.28%     1,827,966     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      20,334               51.6562
Purchase      18,803               52.1500
Purchase      265                  51.1400
Purchase      16,267               51.2821
Purchase      4,539                51.3400
Purchase      20                   Transfer
Purchase      1,194                51.1000
Purchase      300                  51.6085
Purchase      68                   51.3400
Purchase      339                  51.8382
Purchase      18,294               51.2251
Purchase      5,269                51.3400
Purchase      4,429                51.3400
Purchase      1,549                51.3400
Purchase      2,246                51.4742
Purchase      7,950                51.5676
Purchase      859                  51.7969
Purchase      1,194                51.0854
Purchase      25,824               51.3400
Purchase      149                  51.1400
Purchase      591                  51.8200
Purchase      39                   51.0500
Purchase      261                  51.3400
Purchase      105                  51.0981
Purchase      20,647               51.4683
Purchase      16,980               51.3400
Purchase      243                  51.0981
Purchase      17,864               51.3400
Purchase      31,775               51.5838
Purchase      100                  52.7879
Purchase      20,595               51.3400
Purchase      209                  51.3400
Purchase      13,168               51.7106
Purchase      386                  51.7837
Purchase      4,140                51.2219
Purchase      4,435                51.3400
Purchase      3,692                51.2604
Purchase      17,000               51.3400
Purchase      3,000                51.2493
Purchase      9,600                51.7015
Purchase      15,490               51.3400
Purchase      172                  51.8800
Purchase      386                  51.1400
Purchase      16,565               51.2369
Purchase      1,558                51.0981
Purchase      4,647                51.3400
Purchase      300                  51.6085
Purchase      1,175                51.5752
Purchase      9,756                51.2194
Purchase      57                   51.3400
Purchase      994                  51.1960
Sale          17,000               51.3400
Sale          46                   51.4725
Sale          1,194                51.1000
Sale          339                  51.8304
Sale          261                  51.3400
Sale          149                  51.1400
Sale          12,157               51.5908
Sale          18,803               52.1500
Sale          70                   51.8826
Sale          386                  51.7837
Sale          1,194                51.0854
Sale          68                   51.3400
Sale          2,246                51.4742
Sale          57                   51.3400
Sale          20,647               51.4683
Sale          859                  51.7917
Sale          60                   51.5760
Sale          18,803               52.1500
Sale          16,565               51.2369
Sale          300                  51.6085
Sale          42                   Transfer
Sale          25,824               51.3400
Sale          9,600                51.6938
Sale          386                  51.1400
Sale          172                  51.8706
Sale          13,168               51.7106
Sale          1,175                51.5700
Sale          591                  51.8200
Sale          17,265               51.3369
Sale          20,595               51.3400
Sale          100                  52.7879
Sale          4,140                51.2219
Sale          209                  51.3400
Sale          265                  51.1400
Sale          7,950                51.5630
Sale          21,888               51.3400
Sale          226                  50.8800
Sale          3,692                51.2558
Sale          46                   51.5000

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1550          51.0931
CFD            Short         4140          51.2219
CFD            Short         3000          51.2493
CFD            Short         2142          51.3814
CFD            Short         1175          51.5751
CFD            Short         300           51.6085
CFD            Short         9600          51.7015
CFD            Short         13168         51.7106
CFD            Short         100           52.7879
CFD            Long          62            51.2154
CFD            Long          2358          51.4068
CFD            Long          2246          51.4742
CFD            Long          5592          51.6287
CFD            Long          859           51.7917
CFD            Long          591           51.82
CFD            Long          339           51.8304

(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                         09 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                   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   200,000                60.0000          AMER           18/01/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
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

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