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               23 June 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      44,701,469      4.48%     1,089,463      0.11%
securities
(2) Derivatives      862,945      0.09%     2,222,490      0.22%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             45,665,614      4.58%     3,312,983      0.33%


(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         84                    59.3900
Purchase         134                   60.4208
Purchase         21,752                59.9909
Purchase         19                    Transfer
Purchase         195                   59.7400
Purchase         2,400                 59.7157
Purchase         100                   59.5500
Purchase         7,88                  59.6546
Purchase         23,744                59.7400
Purchase         844                   59.2300
Purchase         84                    59.7400
Purchase         47                    59.4270
Purchase         214                   59.7400
Purchase         12,248                59.7400
Purchase         4,367                 59.5229
Purchase         722                   60.4500
Purchase         659                   60.4500
Purchase         26,410                59.7400
Purchase         244                   60.0500
Purchase         44,270                59.8000
Purchase         9,681                 59.8000
Purchase         412                   Transfer
Purchase         4,066                 60.0672
Sale             134                   60.4208
Sale             49,378                59.4626
Sale             19                    Transfer
Sale             14,500                59.7400
Sale             1,374                 59.5339
Sale             26,100                60.0532
Sale             200                   59.3500
Sale             3                     59.3965
Sale             1,200                 58.9978
Sale             721                   59.5300
Sale             50                    59.6876
Sale             1,447                 59.8000
Sale             130                   59.2100
Sale             35                    59.5460
Sale             55                    59.6445
Sale             57                    59.7400
Sale             11,777                59.7400
Sale             100                   59.6875
Sale             2,000                 59.4090
Sale             5,670                 59.7400
Sale             46                    59.4135
Sale             100                   59.6875
Sale             100                   59.5460
Sale             1,148                 61.2816
Sale             125                   59.6010
Sale             100                   59.7700
Sale             117                   59.6500
Sale             3,541                 59.5062
Sale             27                    59.7400



(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          1200          58.9978
CFD            Long          200           59.35
CFD            Long          2000          59.409
CFD            Long          49378         59.4625
CFD            Long          3541          59.5061
CFD            Long          1227          59.521
CFD            Long          1374          59.5339
CFD            Long          125           59.601
CFD            Long          3038          59.752
CFD            Long          26100         60.0531
CFD            Long          1148          61.2816
CFD            Short         4367          59.5229
CFD            Short         7887          59.6545
CFD            Short         2400          59.7157
CFD            Short         21752         59.9909
CFD            Short         4066          60.0672



(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                         24 June 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   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           19/09/2008
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