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 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      46,777,003      4.69%     1,015,011      0.10%
securities
(2) Derivatives    2,764,113      0.28%       201,393      0.02%
(other than
options)
(3) Options and      101,461      0.01%       341,080      0.03%
agreements to
purchase/sell
Total             49,642,577      4.97%     1,557,484      0.16%


(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         2,941                 61.0179
Purchase         3,270                 61.2900
Purchase         7,400                 61.2900
Purchase         516                   60.9111
Purchase         652                   60.9111
Purchase         620                   61.2884
Purchase         676                   60.9111
Purchase         18,039                60.5500
Purchase         634                   60.9111
Purchase         4,598                 60.9111
Purchase         11,878                60.9111
Purchase         833                   60.9111
Purchase         183                   60.9951
Purchase         292                   60.9111
Purchase         800                   60.7685
Purchase         22,000                63.0000
Purchase         8,018                 60.9443
Purchase         10,000                61.0741
Purchase         47                    Transfer
Purchase         214                   62.1508
Purchase         214                   61.3100
Purchase         7,201                 60.8872
Purchase         2,228                 61.0527
Purchase         900                   61.2000
Purchase         12,824                60.8539
Purchase         1,803                 60.9111
Purchase         2,034                 60.9111
Purchase         945                   60.9111
Purchase         78,505                61.2900
Purchase         1,495                 61.2900
Purchase         190                   61.5000
Purchase         277                   61.5000
Purchase         748                   61.0476
Purchase         200                   61.3368
Purchase         259                   60.9111
Purchase         318                   60.9111
Purchase         2,980                 60.9111
Purchase         3,387                 61.2900
Purchase         3,708                 60.9111
Purchase         977                   60.9111
Purchase         506                   61.5000
Purchase         198                   61.0277
Sale             34                    60.8615
Sale             900                   61.3999
Sale             32                    60.7245
Sale             155                   60.7475
Sale             690                   60.9851
Sale             214                   62.1508
Sale             68                    61.2100
Sale             285                   60.8454
Sale             50                    61.2060
Sale             1,473                 60.9851
Sale             448                   60.9851
Sale             2,921                 60.7289
Sale             50                    60.6376
Sale             550                   61.3723
Sale             220                   60.9851
Sale             50                    61.2116
Sale             370                   60.7200
Sale             7,700                 61.2141
Sale             1,495                 61.2900
Sale             4,269                 60.9851
Sale             63,121                61.2609
Sale             610                   60.9851
Sale             47                    Transfer
Sale             80                    60.6230
Sale             134                   61.1390
Sale             60                    60.6075
Sale             400                   61.0800
Sale             125                   61.0000
Sale             79                    61.0916
Sale             7,200                 61.4122
Sale             1,924                 60.9851
Sale             162                   60.9851

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2921          60.7289
CFD            Long          134           61.0457
CFD            Long          3318          61.0483
CFD            Long          766           61.0669
CFD            Long          7700          61.2141
CFD            Long          63121         61.2609
CFD            Long          1619          61.3023
CFD            Long          464           61.3107
CFD            Long          900           61.3999
CFD            Long          7200          61.4122
CFD            Short         800           60.7685
CFD            Short         12824         60.8538
CFD            Short         7201          60.8872
CFD            Short         8018          60.9443
CFD            Short         2941          61.0179
CFD            Short         2228          61.0527
CFD            Short         10000         61.074
CFD            Short         900           61.2

(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 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