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               03 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      48,512,015     4.86%        975,526     0.10%
securities
(2) Derivatives      1,108,941   0.11%      1,927,107     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,722,156     4.98%      3,179,592     0.32%


(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         25,200                28.7440
Purchase         29,772                29.0000
Purchase         1,586                 29.0802
Purchase         601                   28.6447
Purchase         200                   29.0000
Purchase         205                   28.7900
Purchase         13,300                28.7440
Purchase         350                   28.6800
Purchase         170                   28.9100
Purchase         5,239                 28.7864
Purchase         52,928                29.0000
Purchase         7,400                 28.7440
Purchase         4,600                 29.4327
Purchase         1,768                 28.9625
Purchase         3,678                 28.7960
Purchase         1,300                 28.6558
Purchase         22,755                29.1778
Purchase         100                   28.5900
Purchase         4,900                 29.0587
Purchase         25,486                28.6047
Purchase         11,807                29.0000
Purchase         825                   28.6400
Purchase         467,353               28.6400
Purchase         976                   29.0000
Purchase         1,034                 29.0802
Purchase         3,399                 29.0000
Purchase         145                   29.0000
Purchase         915                   29.1168
Purchase         3,616                 29.0000
Purchase         1,397                 29.0000
Purchase         3,399                 29.0000
Purchase         850                   29.0000
Purchase         170                   28.7900
Purchase         140                   28.7900
Purchase         425                   29.0000
Purchase         170                   28.9700
Purchase         1,159                 27.2400
Sale             990                   27.3800
Sale             1,808                 Transfer
Sale             100                   28.5900
Sale             27,543                28.6455
Sale             17,813                28.5592
Sale             148                   Transfer
Sale             73,119                28.8961
Sale             832                   28.6195
Sale             500                   28.9557
Sale             111                   29.7540
Sale             143                   28.0600
Sale             448                   28.0600
Sale             1,400                 28.9294
Sale             1,729                 28.8039
Sale             73                    Transfer
Sale             68,681                28.5201
Sale             1,688                 28.8582
Sale             80                    28.7910
Sale             210                   29.0000
Sale             191                   29.0000
Sale             3,616                 29.0000
Sale             11,226                28.6400
Sale             67,424                28.7733

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          68681         28.5201
CFD            Long          17813         28.5592
CFD            Long          100           28.59
CFD            Long          27543         28.6454
CFD            Long          67424         28.7733
CFD            Long          1729          28.8039
CFD            Long          3489          28.8307
CFD            Long          1688          28.8582
CFD            Long          73119         28.896
CFD            Long          2297          28.9286
CFD            Long          500           8.9556
CFD            Long          1955          29.0343
CFD            Short         100           28.59
CFD            Short         25486         28.6047
CFD            Short         601           28.6446
CFD            Short         1300          28.6558
CFD            Short         5239          28.7864
CFD            Short         3678          28.796
CFD            Short         1768          28.9625
CFD            Short         4900          29.0587
CFD            Short         22755         29.1778

(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                         04 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