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               19 November 2007

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      47,047,640      4.72%    2,602,804       0.26%
securities
(2) Derivatives    4,887,826      0.49%    2,098,969       0.21%
(other than
options)
(3) Options and        3,206      0.00%      702,706       0.07%
agreements to
purchase/sell
Total             51,938,672      5.21%    5,404,479       0.54%


(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      1,181                53.2778
Purchase      5,708                52.6983
Purchase      10,044               50.5300
Purchase      12,718               52.8257
Purchase      14,225               52.8257
Purchase      1,360                53.2778
Purchase      28,936               52.7316
Purchase      262,327              52.8257
Purchase      54,661               52.8257
Purchase      2,406                53.2778
Purchase      6,734                52.8257
Purchase      20                   Transfer
Purchase      4,346                52.8257
Purchase      1,635                Transfer
Purchase      52,341               52.8257
Purchase      10,979               52.8257
Purchase      100                  50.6963
Purchase      136                  53.8481
Purchase      8,206                52.8257
Purchase      18,857               52.8257
Purchase      4,040                52.8257
Purchase      4,542                52.9653
Purchase      24,528               Transfer
Purchase      6,266                52.1283
Purchase      110,990              52.8257
Purchase      10,755               52.8257
Purchase      4,542                52.9653
Purchase      3,368                52.8257
Purchase      276                  Transfer
Purchase      4,393                Transfer
Purchase      17,988               52.8257
Purchase      21,087               52.8257
Purchase      11,692               52.8257
Purchase      21,000               50.5300
Purchase      9,485                53.3104
Purchase      4,393                Transfer
Purchase      49,389               52.8257
Sale          448                  50.5300
Sale          75                   53.0451
Sale          120                  52.5425
Sale          50                   52.9450
Sale          654                  53.3185
Sale          30                   53.6175
Sale          3,222                50.5300
Sale          858                  53.7793
Sale          125                  52.9575
Sale          6,555                53.1200
Sale          8,707                53.3740
Sale          270                  52.5425
Sale          200                  53.0362
Sale          7,148                52.1318
Sale          300                  53.6225
Sale          135                  50.6337
Sale          1,800                Transfer
Sale          70                   52.5426
Sale          220                  52.5425
Sale          145                  52.9734
Sale          65                   53.1051
Sale          100                  53.1250
Sale          67                   52.5425
Sale          100                  53.2100
Sale          7,560                53.3996
Sale          4,542                52.9653
Sale          75                   52.7612
Sale          70                   52.5426
Sale          100                  52.3925
Sale          63,848               53.4439
Sale          110                  52.5425
Sale          265                  52.5850
Sale          270                  52.5425
Sale          75                   52.5425
Sale          21,747               52.9250
Sale          161                  53.6250
Sale          130                  52.6225
Sale          45                   52.5424

Sale 250,000 42.0000(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         100           50.6963
CFD            Short         6266          52.1282
CFD            Short         28936         52.7315
CFD            Short         7612          52.7873
CFD            Short         4542          52.9652
CFD            Short         9485          53.3104
CFD            Short         136           53.848
CFD            Long          7148          52.1317
CFD            Long          21747         52.925
CFD            Long          145           52.9733
CFD            Long          654           53.3185
CFD            Long          8707          53.3739
CFD            Long          7560          53.3996
CFD            Long          63848         53.4438
CFD            Long          858           53.7793

(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                         20 November 2007
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                    3,000.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -1,000                 3,500.0000       EURO           21/12/2007
Option            Purchased   -500                   4,400.0000       EURO           21/12/2007
Option            Purchased   -350                   5,200.0000       EURO           21/12/2007
Option            Purchased   -306                   4,200.0000       EURO           21/12/2007
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -600,000               42.0000          AMER           21/12/2007
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   500                    5,200.0000       EURO           21/12/2007
Option            Purchased   250                    3,300.0000       EURO           21/12/2007
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    4,500.0000       EURO           21/12/2007
Option            Purchased   306                    4,800.0000       EURO           21/12/2007
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   450                    3,500.0000       EURO           21/12/2007
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