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               21 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      47,051,502      4.72%    2,703,326       0.27%
securities
(2) Derivatives    4,956,018      0.50%    2,164,292       0.22%
(other than
options)
(3) Options and        3,481      0.00%      702,706       0.07%
agreements to
purchase/sell
Total             52,011,001      5.22%     5,570,324      0.56%


(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      116                  49.8562
Purchase      25                   50.6476
Purchase      868                  50.3586
Purchase      16,340               49.0000
Purchase      341                  50.7700
Purchase      59,204               49.6302
Purchase      22,000               49.0000
Purchase      8,820                49.0000
Purchase      458                  50.1650
Purchase      4,393                49.0000
Purchase      868                  50.3586
Purchase      1,127                49.0000
Purchase      5,200                50.1857
Purchase      4,807                49.0000
Purchase      112                  50.3650
Purchase      4,998                49.8904
Purchase      500                  50.7916
Purchase      24                   50.3775
Sale          100                  49.6040
Sale          116                  50.1300
Sale          150                  49.8500
Sale          38                   50.0375
Sale          75                   49.4351
Sale          52                   Transfer
Sale          15                   49.8500
Sale          4,005                49.3821
Sale          436                  50.7600
Sale          295                  49.8500
Sale          50                   49.9676
Sale          44,682               50.1338
Sale          103                  49.3550
Sale          4,807                49.0000
Sale          170                  49.8500
Sale          200                  49.8500
Sale          5,200                50.1857
Sale          186                  Transfer
Sale          275                  48.9975
Sale          150                  50.2524
Sale          215                  49.8500
Sale          250                  49.8500
Sale          2,000                50.5000
Sale          5,200                50.1857
Sale          195                  50.1300
Sale          200                  49.8500
Sale          250                  49.8500
Sale          202                  49.8500
Sale          150                  50.1616
Sale          200                  49.8500
Sale          218                  49.8287
Sale          220                  50.1650
Sale          273                  Transfer
Sale          3,409                49.6013
Sale          190                  50.1400
Sale          250                  49.8500
Sale          868                  50.3586
Sale          150                  49.8500
Sale          125                  49.8500
Sale          624                  50.3000
Sale          150                  49.8500
Sale          195                  50.1300
Sale          75                   50.2712
Sale          180                  49.8500
Sale          49                   49.8850
Sale          6,500                50.5000
Sale          10,896               50.0979

NB: The below transactions which were previously disclosed have been cancelled
Deal Date     Purchase/Sale        Number of      Price per unit (GBP)
                                   Securities
15/11/2007    Purchase             32,000         54.8750

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         59204         49.6302
CFD            Short         116           49.8562
CFD            Short         4998          49.8904
CFD            Short         868           50.3585
CFD            Short         112           50.365
CFD            Short         25            50.6476
CFD            Long          4005          49.3821
CFD            Long          3409          49.6012
CFD            Long          10896         50.0978
CFD            Long          44682         50.1338
CFD            Long          5200          50.1857

(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                         22 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   275                    5,000.0000       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