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               05 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      46,742,933      4.68%     1,105,983      0.11%
securities
(2) Derivatives    2,845,183      0.29%       225,385      0.02%
(other than
options)
(3) Options and      101,461      0.01%       341,080      0.03%
agreements to
purchase/sell
Total             49,689,577      4.98%     1,672,448      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         3,258                 59.6200
Purchase         263                   59.0346
Purchase         237                   59.0346
Purchase         210                   59.0346
Purchase         82                    59.1851
Purchase         916                   59.1851
Purchase         466                   59.1851
Purchase         11                    58.9640
Purchase         1,800                 59.1209
Purchase         50                    58.6270
Purchase         177                   59.1851
Purchase         3,258                 59.6200
Purchase         50                    58.6600
Purchase         424                   58.9413
Purchase         884                   58.9413
Purchase         100                   58.5810
Purchase         15,750                59.6200
Purchase         1,114                 Transfer
Purchase         60                    58.9255
Purchase         13,503                59.1955
Purchase         6,035                 58.8866
Purchase         140                   62.2020
Purchase         1,831                 58.9074
Purchase         61,880                59.1426
Purchase         161,131               58.7878
Purchase         3,600                 59.0389
Purchase         400                   59.1284
Purchase         600                   58.7500
Purchase         20                    74.5000 EUR
Purchase         29,452                59.4257
Purchase         1,400                 59.0300
Purchase         500                   58.7500
Sale             690                   59.0211
Sale             1,114                 Transfer
Sale             4,604                 59.6200
Sale             150                   58.8300
Sale             145                   59.5960
Sale             150                   59.2000
Sale             50                    59.0060
Sale             35,912                59.2701
Sale             22,788                58.7204
Sale             9,000                 58.9900
Sale             1,714                 58.6691
Sale             175                   58.8460
Sale             55                    58.4291
Sale             150                   58.7990
Sale             140                   62.2020
Sale             200                   58.4545
Sale             50                    59.0930
Sale             200                   58.9300
Sale             395                   58.8643
Sale             3,879                 59.0135
Sale             21                    58.9500
Sale             452                   59.0135
Sale             302                   59.0135
Sale             12,260                59.2811
Sale             9,668                 58.6487
Sale             161,131               58.7878
Sale             120                   59.4800

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          9668          58.6486
CFD            Long          1714          58.6691
CFD            Long          22788         58.7203
CFD            Long          161131        58.7878
CFD            Long          690           59.0211
CFD            Long          35912         59.27
CFD            Long          12260         59.281
CFD            Long          167           59.632
CFD            Short         476           58.4648
CFD            Shor          161131        58.7878
CFD            Short         3229          58.8466
CFD            Short         6035          58.8866
CFD            Short         1831          58.9073
CFD            Short         1400          59.03
CFD            Short         3600          59.0388
CFD            Short         1800          59.1209
CFD            Short         400           59.1284
CFD            Short         61880         59.1426
CFD            Short         1350          59.1955
CFD            Short         29452         59.4256

(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                         06 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