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               02 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      46,657,411      4.67%       967,236      0.10%
securities
(2) Derivatives    2,712,006      0.27%       192,517      0.02%
(other than
options)
(3) Options and      101,461      0.01%       341,080      0.03%
agreements to
purchase/sell
Total             49,470,878      4.96%     1,500,833      0.15%


(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         125                   60.9491
Purchase         149,818               61.0901
Purchase         4,261                 61.7202
Purchase         195                   61.1516
Purchase         1,100                 Transfer
Purchase         5,700                 61.1141
Purchase         4,170                 61.4263
Purchase         11,948                61.7839
Purchase         1,114                 Transfer
Purchase         160                   60.9968
Purchase         79                    Transfer
Purchase         60                    Transfer
Purchase         835                   61.3034
Purchase         11,219                61.0674
Purchase         3,762                 61.7000
Purchase         82                    59.9900
Purchase         400                   61.1792
Purchase         358                   59.9900
Purchase         28,265                61.5473
Purchase         53,444                61.2928
Sale             3,000                 61.1512
Sale             4,567                 60.9980
Sale             358                   59.9900
Sale             13,705                61.2249
Sale             60                    Transfer
Sale             27                    60.8330
Sale             1,103                 61.2768
Sale             358                   61.5200
Sale             82                    59.9900
Sale             32,167                60.8774
Sale             79                    Transfer
Sale             12,265                61.1647
Sale             6,787                 61.4343
Sale             3                     61.0133
Sale             71                    60.5627
Sale             371                   60.5627
Sale             9,290                 60.5627
Sale             245                   60.5627
Sale             1,786                 60.5627
Sale             299                   60.5627
Sale             5,332                 60.5627
Sale             102                   60.5627
Sale             2,739                 60.5627
Sale             817                   60.5627
Sale             258                   61.0500
Sale             7,286                 61.2192
Sale             300                   60.9822
Sale             58                    60.9800
Sale             100                   60.9275
Sale             20                    61.1160
Sale             51                    60.9831
Sale             100                   60.5640
Sale             70                    61.0720
Sale             1,343                 60.5500
Sale             150                   61.1730
Sale             200                   61.2528
Sale             40                    60.8035
Sale             80                    61.7500
Sale             149,818               61.0840
Sale             173,938               60.5500

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          3216          60.8773
CFD            Long          4567          60.998
CFD            Long          149818        61.0839
CFD            Long          3000          61.1512
CFD            Long          7286          61.2191
CFD            Long          13705         61.2248
CFD            Long          1103          61.2767
CFD            Long          6787          61.4343
CFD            Long          787           61.7364
CFD            Short         125           60.9491
CFD            Short         11219         61.0674
CFD            Short         149818        61.09
CFD            Short         5700          61.1141
CFD            Short         400           61.1791
CFD            Short         53444         61.2927
CFD            Short         4170          61.4262
CFD            Short         28265         61.5473
CFD            Short         4261          61.7202
CFD            Short         11948         61.7839

(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                         03 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                   5,200.0000       EURO           19/09/2008
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                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       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                   2,500.0000       EURO           20/06/2008

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