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               06 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      48,197,874     4.81%        834,283     0.08%
securities
(2) Derivatives    1,005,526     0.10%      1,862,247     0.19%
(other than
options)
(3) Options and      101,200     0.01%       276,959      0.03%
agreements to
purchase/sell
Total             49,304,600     4.92%     2,973,489      0.30%

(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         377                   25.0600
Purchase         300                   27.8500
Purchase         19,636                26.3378
Purchase         4,557                 26.9394
Purchase         4,200                 26.4134
Purchase         342                   29.0800
Purchase         75,062                27.0223
Purchase         200                   26.4350
Purchase         800                   28.0694
Purchase         18,561                27.2329
Purchase         570                   25.0600
Purchase         851                   25.0600
Purchase         17,457                25.3382
Purchase         10                    25.0600
Purchase         39,696                25.0600
Purchase         712                   25.0600
Purchase         4,510                 25.0600
Purchase         1,243                 27.7633
Purchase         850                   25.0600
Purchase         51,278                25.6049
Purchase         425                   25.0600
Purchase         3,560                 28.0600
Purchase         2,812                 31.2700
Purchase         73,263                26.0322
Purchase         250                   25.9950
Purchase         4,263                 25.0600
Purchase         435                   25.0600
Purchase         425                   25.0600
Sale             10                    25.0600
Sale             200                   26.4350
Sale             4,588                 26.7984
Sale             19,514                26.8066
Sale             4,328                 26.4848
Sale             69,630                26.6352
Sale             66,171                25.8945
Sale             23                    Transfer
Sale             3,184                 26.5466
Sale             60,663                25.7757
Sale             65                    26.4320
Sale             1,460                 25.0600
Sale             44,926                25.0600
Sale             222,208               26.5323
Sale             203,427               26.0644
Sale             2,490                 29.4800
Sale             8                     26.4800
Sale             4,127                 25.6057

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2001          25.06
CFD            Long          4127          25.6056
CFD            Long          60663         25.7757
CFD            Long          66171         25.8944
CFD            Long          13900         26.2716
CFD            Long          200           26.435
CFD            Long          4328          26.4847
CFD            Long          3184          26.5465
CFD            Long          69630         26.6352
CFD            Long          4588          26.7984
CFD            Long          19514         26.8065
CFD            Long          3992          27.1343
CFD            Short         17457         25.3382
CFD            Short         51278         25.6049
CFD            Short         73263         26.0321
CFD            Short         19636         26.3377
CFD            Short         4200          26.4133
CFD            Short         200           26.435
CFD            Short         4557          26.9394
CFD            Short         75062         27.0223
CFD            Short         18561         27.2329
CFD            Short         300           27.85
CFD            Short         800           28.0694

(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                         07 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