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               10 November 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      48,448,667     4.83%        639,913     0.06%
securities
(2) Derivatives      811,156     0.08%      1,956,538     0.20%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,361,023     4.92%      2,873,410     0.29%

(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         677                   30.3331
Purchase         20,397                29.0985
Purchase         1,978                 30.0742
Purchase         10,000                28.8300
Purchase         10                    28.0000
Purchase         2,564                 29.7155
Purchase         35,825                29.0054
Purchase         4,830                 28.7408
Purchase         4,698                 28.4003
Purchase         54,772                28.7390
Purchase         942                   29.0300
Purchase         76                    Transfer
Purchase         200                   30.2500
Purchase         3,052                 28.9108
Purchase         8,000                 28.8665
Purchase         7,345                 25.9724
Purchase         22,313                28.4400
Purchase         400                   28.4400
Purchase         5,142                 26.1800
Purchase         33,900                25.9687
Purchase         1,102                 28.0639
Sale             5,700                 30.1500
Sale             848                   30.1800
Sale             200                   30.2500
Sale             2,564                 29.7302
Sale             8,274                 28.9054
Sale             4,985                 28.4077
Sale             48                    29.4300
Sale             23,532                30.2347
Sale             3,410                 29.1398
Sale             110                   28.9193
Sale             38,191                28.9939
Sale             100                   30.2000
Sale             20,760                29.0488
Sale             80                    28.9100
Sale             16,361                29.3589
Sale             619                   29.3300
Sale             10                    28.0000
Sale             73                    30.3100
Sale             175                   29.5000
Sale             100                   29.6100
Sale             5,906                 28.7252
Sale             290                   29.3800
Sale             76                    Transfer

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          9053          28.3938
CFD            Long          4985          28.4076
CFD            Long          5906          28.7252
CFD            Long          8274          28.9054
CFD            Long          110           28.9192
CFD            Long          38191         28.9938
CFD            Long          20760         29.0488
CFD            Long          3410          29.1397
CFD            Long          8212          29.1599
CFD            Long          16361         29.3589
CFD            Long          23532         30.2346
CFD            Long          200           30.25
CFD            Short         46196         28.3396
CFD            Short         4698          28.4003
CFD            Short         54772         28.7389
CFD            Short         4830          28.7407
CFD            Short         8000          28.8664
CFD            Short         3052          28.9108
CFD            Short         35825         29.0054
CFD            Short         20397         29.0985
CFD            Short         3321          29.5008
CFD            Short         1978          30.0741
CFD            Short         200           30.25
CFD            Short         677           30.3331

(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                         11 November 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   100,000                56.0000          AMER           18/12/2009
Option            Purchased   -50,000                64.0000          AMER           21/11/2008
Option            Purchased   -100,000               64.0000          AMER           21/11/2008
Option            Purchased   -125,000               45.0000          AMER           20/03/2009
Option            Purchased   500                    5,000.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -94                    5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -270                   6,400.0000       EURO           19/12/2008
Option            Purchased   -300                   4,400.0000       EURO           19/12/2008
Option            Purchased   -300                   4,400.0000       EURO           19/12/2008
Option            Purchased   -350                   5,000.0000       EURO           19/12/2008
Option            Purchased   -500                   7,000.0000       EURO           19/12/2008

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