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               31 October 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      48,092,570     4.82%        851,399     0.09%
securities
(2) Derivatives      984,814     0.10%      2,003,491     0.20%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,178,584     4.93%      3,131,849     0.31%


(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         790                   28.6400
Purchase         27,978                28.6400
Purchase         3,118                 27.5273
Purchase         330                   27.7342
Purchase         2,489                 28.6400
Purchase         235                   28.6400
Purchase         6,616                 28.6400
Purchase         2,044                 28.6400
Purchase         3,700                 28.2681
Purchase         14,658                28.6400
Purchase         5,955                 28.6400
Purchase         25,360                28.3929
Purchase         228                   28.6400
Purchase         20,517                28.6400
Purchase         1,144                 28.6400
Purchase         29,695                28.6400
Purchase         84,459                28.8654
Purchase         1,702                 28.6400
Purchase         33,469                28.6400
Purchase         44,625                28.6400
Purchase         6,717                 28.2778
Purchase         6,500                 28.6400
Purchase         2,972                 27.9076
Purchase         884                   28.6400
Purchase         195                   28.6400
Purchase         4,536                 27.2400
Purchase         1,237                 28.6400
Purchase         106                   Transfer
Purchase         3,853                 28.6400
Purchase         27,800                27.5290
Purchase         105,370               27.6956
Purchase         5,051                 28.6400
Purchase         100                   28.7800
Purchase         145                   28.6400
Purchase         17                    28.6400
Purchase         20,891                28.6400
Purchase         442                   28.6400
Purchase         805                   28.6400
Purchase         1,035                 28.6400
Sale             66                    28.1600
Sale             41                    28.9710
Sale             31                    28.0500
Sale             7,234                 28.1176
Sale             60                    Transfer
Sale             3,600                 27.7726
Sale             68,749                27.8566
Sale             19,099                28.1942
Sale             100                   28.7800
Sale             35,352                27.8728
Sale             89,196                28.7315
Sale             90                    28.8957
Sale             45                    28.0600
Sale             265                   28.6400
Sale             6,992                 28.6400
Sale             5,090                 28.6400
Sale             765                   28.6400
Sale             100                   37.7000 EUR
Sale             300                   29.3400
Sale             539                   28.6400
Sale             513                   28.6400
Sale             85                    26.9720
Sale             811                   28.6400
Sale             8,655                 28.6400
Sale             2,580                 28.6400
Sale             2,121                 27.1380
Sale             2,712                 28.6400
Sale             2,636                 28.6400
Sale             110                   26.7730
Sale             8,558                 28.6400
Sale             599                   28.6400
Sale             315                   28.6400
Sale             2,812                 27.3700
Sale             200                   27.5230
Sale             825                   28.6400
Sale             811                   28.6400

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          8874          26.7584
CFD            Long          23511         26.8106
CFD            Long          3600          27.7726
CFD            Long          68749         27.8566
CFD            Long          35352         27.8728
CFD            Long          7234          28.1175
CFD            Long          19099         28.1941
CFD            Long          11649         28.2295
CFD            Long          6881          28.2322
CFD            Long          6747          28.2346
CFD            Long          3051          28.6486
CFD            Long          89196         28.7314
CFD            Long          100           28.78
CFD            Long          90            28.8956
CFD            Long          1041          29.0165
CFD            Long          660           29.6028
CFD            Short         27800         27.529
CFD            Short         105370        27.6955
CFD            Short         330           27.7341
CFD            Short         2972          27.9075
CFD            Short         3700          28.2681
CFD            Short         6717          28.2777
CFD            Short         25360         28.3929
CFD            Short         100           28.78
CFD            Short         84459         28.8654

(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                         03 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   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
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

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