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               11 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      50,269,501     5.04%       940,238       0.09%
securities
(2) Derivatives    2,342,283     0.23%       151,479       0.02%
(other than
options)
(3) Options and      202,500     0.02%       701,200       0.07%
agreements to
purchase/sell
Total              52,814,284    5.30%      1,792,917      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      2,943                50.2481
Purchase      45,200               50.4547
Purchase      40                   49.9935
Purchase      100                  52.7879
Purchase      1,194                50.6282
Purchase      42,885               50.2787
Purchase      23,000               50.5297
Purchase      756                  49.8950
Purchase      7,827                50.2769
Purchase      12,387               50.5276
Purchase      1,894                50.3594
Purchase      3,004                50.6282
Purchase      42,885               50.2787
Purchase      1,894                50.3594
Purchase      50,961               50.1901
Purchase      246                  50.4508
Purchase      2,967                50.0615
Purchase      382                  50.6282
Purchase      11,000               51.2000
Purchase      42                   Transfer
Purchase      1,600                51.2577
Purchase      22,200               50.3770
Purchase      9,527                50.3074
Purchase      3,684                51.2000
Purchase      389                  50.6282
Purchase      1,600                51.2577
Purchase      445                  50.6282
Purchase      32,487               51.2000
Purchase      26,124               50.3680
Purchase      27,975               50.3042
Purchase      2,983                50.0061
Purchase      23,000               50.5297
Purchase      402                  50.6282
Purchase      2,473                50.4684
Purchase      2,400                50.2375
Purchase      100                  52.7879
Purchase      206                  50.4508
Sale          50,961               50.1901
Sale          55                   51.1675
Sale          11,000               51.2000
Sale          2,400                50.2300
Sale          2,473                50.4684
Sale          25                   50.6500
Sale          9,527                50.3028
Sale          23,000               50.5297
Sale          145                  50.4024
Sale          2,943                50.2430
Sale          100                  50.6325
Sale          42,885               50.2787
Sale          100                  52.7879
Sale          1,600                51.2577
Sale          2,473                50.4684
Sale          2,967                50.0540
Sale          2,983                50.0011
Sale          2,030                Transfer
Sale          12,387               50.5230
Sale          26,124               50.3680
Sale          26,124               50.3680
Sale          200                  51.0925
Sale          11,000               51.2000
Sale          4,268                49.9177
Sale          200                  50.3700
Sale          27,975               50.3042
Sale          7,827                50.2769
Sale          90                   50.4926
Sale          20,800               51.0300
Sale          23,000               50.5297
Sale          7,745                51.2000
Sale          22,200               50.3770
Sale          67,629               50.3300
Sale          60                   50.2700
Sale          1,894                50.3594

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         2983         50.0061
CFD            Short         2000         50.1595
CFD            Short         2400         50.2375
CFD            Short         27975        50.3042
CFD            Short         7527         50.3466
CFD            Short         1894         50.3593
CFD            Short         1600         51.2576
CFD            Short         100          52.7879
CFD            Long          2967         50.0539
CFD            Long          2943         50.243
CFD            Long          7827         50.2768
CFD            Long          2473         50.4683
CFD            Long          7207         50.5138
CFD            Long          5180         50.5358

(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                         14 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                    3,000.0000       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   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   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