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               04 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      46,698,846      4.68%     1,120,112      0.11%
securities
(2) Derivatives    2,871,441      0.29%       211,236      0.02%
(other than
options)
(3) Options and      101,461      0.01%       341,080      0.03%
agreements to
purchase/sell
Total             49,671,748      4.98%     1,672,428      0.17%


(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         664                   61.1128
Purchase         10,000                60.0514
Purchase         2,000                 60.1433
Purchase         2,200                 60.2687
Purchase         2,711                 60.1868
Purchase         500                   60.1600
Purchase         415                   59.9193
Purchase         798                   60.2599
Purchase         301                   60.2599
Purchase         1,06                  60.0400
Purchase         199                   60.2530
Purchase         413                   61.1128
Purchase         10,441                61.1128
Purchase         10,900                61.0459
Purchase         8,917                 60.0400
Purchase         8,300                 60.1736
Purchase         448                   60.0400
Purchase         400                   60.0490
Purchase         4,250                 60.3198
Purchase         3,000                 60.0323
Purchase         2,995                 60.2113
Sale             11                    Transfer
Sale             65                    60.0815
Sale             47                    60.0000
Sale             90                    60.0300
Sale             19,747                60.2449
Sale             100                   60.0300
Sale             50                    60.0220
Sale             100                   60.0300
Sale             4,981                 60.3098
Sale             72,000                60.6598
Sale             85                    60.0690
Sale             50                    60.0300
Sale             9,499                 60.3634
Sale             272                   60.0300
Sale             12                    59.9345
Sale             7,300                 60.1354
Sale             529                   60.0600
Sale             768                   59.9686
Sale             836                   60.1976
Sale             16,898                60.0439
Sale             49                    Transfer
Sale             77                    Transfer
Sale             17                    Transfer
Sale             50                    60.0300
Sale             100                   60.0300
Sale             100                   60.0300
Sale             155                   60.0300
Sale             100                   59.9716
Sale             150                   60.0630
Sale             150                   60.2100
Sale             100                   60.0300
Sale             100                   60.0300
Sale             200                   60.0300
Sale             100                   60.0300
Sale             100                   60.0300
Sale             85                    59.9228
Sale             105                   59.9860
Sale             90                    76.2200 EUR
Sale             6,504                 61.2900
Sale             5,000                 60.0400
Sale             100                   60.0300
Sale             50                    60.0300
Sale             200                   60.0300
Sale             150                   60.0300
Sale             257                   60.0200
Sale             150                   60.0300
Sale             100                   60.0300
Sale             150                   60.0220
Sale             125                   60.0300
Sale             160                   60.0300
Sale             50                    60.1600
Sale             100                   60.0775
Sale             160                   60.0815
Sale             100                   60.0300
Sale             200                   60.0300
Sale             85                    60.2031
Sale             60                    60.0300
Sale             100                   60.0300

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          16898         60.0439
CFD            Long          7300          60.1353
CFD            Long          836           60.1975
CFD            Long          19747         60.2448
CFD            Long          4981          60.3097
CFD            Long          9499          60.3634
CFD            Long          72000         60.6597
CFD            Short         415           59.9192
CFD            Short         3000          60.0323
CFD            Short         400           60.049
CFD            Short         10000         60.0514
CFD            Short         2000          60.1433
CFD            Short         500           60.16
CFD            Short         8300          60.1736
CFD            Short         2711          60.1868
CFD            Short         2200          60.2687
CFD            Short         4250          60.3198

(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                         05 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   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -38,000                70.0000          AMER           20/06/2008
Option            Purchased   -10,000                74.0000          AMER           20/06/2008
Option            Purchased   -2,000                 70.0000          AMER           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -190,000               74.0000          AMER           20/06/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   100,000                56.0000          AMER           18/12/2009
Option            Purchased   11                     7,600.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           19/09/2008

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