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               19 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      45,259,265      4.53%       544,742      0.05%
securities
(2) Derivatives    2,807,839      0.28%        73,534      0.01%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             48,169,065      4.83%       959,856      0.10%


(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         10,300                61.0751
Purchase         13,753                60.8216
Purchase         1,663                 61.0767
Purchase         18,365                60.9799
Purchase         16,274                61.0713
Purchase         100                   61.5192
Purchase         100                   61.5192
Purchase         425                   60.9332
Purchase         224                   61.4361
Purchase         3,700                 61.5084
Purchase         1,893                 60.0079
Purchase         27,979                60.9000
Purchase         5,031                 60.8861
Purchase         1,070                 61.4361
Purchase         754                   61.4361
Purchase         230                   61.4361
Purchase         4,583                 60.8176
Purchase         549                   61.5182
Purchase         1,428                 61.3724
Sale             11,300                61.1961
Sale             1,000                 60.7409
Sale             30                    60.2075
Sale             60                    61.0400
Sale             4,361                 60.9696
Sale             34,392                60.9613
Sale             91                    60.7500
Sale             2,148                 60.3701
Sale             49                    Transfer
Sale             13,500                61.5050
Sale             28                    Transfer
Sale             400                   61.2200
Sale             150                   61.0115
Sale             406                   61.3750
Sale             27,979                60.9000
Sale             27,979                60.9000
Sale             164                   61.0600
Sale             274                   61.0600
Sale             150                   61.2200
Sale             116                   60.7775
Sale             100                   61.2120
Sale             100                   60.9205
Sale             120                   60.9235
Sale             75                    61.5165
Sale             6,784                 60.8100
Sale             195                   61.0600
Sale             368                   61.2600
Sale             205                   61.4900
Sale             607                   61.0539
Sale             150                   61.5172
Sale             130                   60.5700



(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2148          60.3701
CFD            Long          1000          60.7408
CFD            Long          91            60.75
CFD            Long          34392         60.9612
CFD            Long          4361          60.9695
CFD            Long          607           61.0538
CFD            Long          11300         61.1961
CFD            Long          13500         61.5049
CFD            Long          3654          61.5818
CFD            Short         4583          60.8176
CFD            Short         13753         60.8215
CFD            Short         5031          60.886
CFD            Short         18365         60.9798
CFD            Short         5102          61.0631
CFD            Short         16274         61.0712
CFD            Short         10300         61.075
CFD            Short         3700          61.5084
CFD            Short         549           61.5181



(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                         20 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   -500                   7,000.0000       EURO           19/12/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   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   500                    5,000.0000       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