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 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      47,166,636      4.73%       708,264      0.07%
securities
(2) Derivatives    2,763,677      0.28%       270,410      0.03%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             50,032,274      5.01%     1,320,254      0.13%


(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         38,323                 60.6392
Purchase         16,128                 59.5967
Purchase         9,596                  60.6266
Purchase         1,935                  61.0797
Purchase         370                    60.9300
Purchase         6,208                  59.0589
Purchase         59,956                 60.8115
Purchase         370                    60.9100
Purchase         1,203                  60.6308
Purchase         40                     61.0793
Purchase         24,898                 60.8011
Purchase         14,883                 61.0122
Purchase         343                    60.5833
Purchase         29,147                 59.7720
Purchase         2                      74.1700 EUR
Purchase         315,000                60.9000
Purchase         3,998                  60.5907
Sale             370                    60.9300
Sale             50                     60.3875
Sale             8,200                  60.2788
Sale             722                    60.1100
Sale             3,998                  60.5907
Sale             51                     60.2275
Sale             27                     58.7245
Sale             330                    60.5514
Sale             1,342                  60.7600
Sale             8,919                  60.2346
Sale             1,401                  60.5545
Sale             150                    60.6100
Sale             50                     60.2990
Sale             280                    60.6800
Sale             171                    60.5523
Sale             169                    60.5522
Sale             2,150                  60.5547
Sale             44,146                 61.0557
Sale             243                    60.5507
Sale             5,036                  60.8318
Sale             100                    60.8222
Sale             731                    60.5526
Sale             479                    60.5520
Sale             276                    60.5498
Sale             5,032                  60.5545
Sale             12,125                 60.5547
Sale             150                    59.7545
Sale             87                     60.2000
Sale             1,762                  60.7932
Sale             150                    59.7615

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          8200          60.2788
CFD            Long          3998          60.5906
CFD            Long          1762          60.7931
CFD            Long          5036          60.8317
CFD            Long          44146         61.0557
CFD            Short         6208          59.0588
CFD            Short         16128         59.5967
CFD            Short         29147         59.7719
CFD            Short         176           60.4893
CFD            Short         3998          60.5906
CFD            Short         9596          60.6266
CFD            Short         1203          60.6307
CFD            Short         38323         60.6391
CFD            Short         24898         60.8011
CFD            Short         59956         60.8115
CFD            Short         40            61.0792

(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)
Call            Sale              500                70        EURO            19/12/2008  5.24
Put             Purchase          500                50        EURO            19/12/2008  3.20

(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                         09 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