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               17 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      46,940,101      4.70%       530,796      0.05%
securities
(2) Derivatives    2,796,042      0.28%       124,139      0.01%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             49,838,104      4.99%       996,515      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         2,725                 60.9901
Purchase         385                   60.4431
Purchase         333                   60.4431
Purchase         192                   60.4431
Purchase         344                   60.4431
Purchase         2,630                 60.4431
Purchase         10,965                60.4431
Purchase         575                   60.4431
Purchase         187                   60.4431
Purchase         829                   60.2661
Purchase         194                   60.4431
Purchase         132                   Transfer
Purchase         215                   60.4431
Purchase         9,917                 60.1483
Purchase         100                   58.9097
Purchase         8,228                 60.5122
Purchase         1,118                 60.4117
Purchase         151                   58.7084
Purchase         30                    Transfer
Purchase         151                   60.1900
Purchase         2,495                 60.9618
Purchase         18,318                61.0086
Purchase         131                   Transfer
Purchase         1,250                 Transfer
Purchase         19,600                60.1110
Purchase         39,000                60.9137
Purchase         6,113                 60.1861
Purchase         27,255                60.4230
Purchase         890                   60.4431
Purchase         30                    76.5100 EUR
Purchase         50                    76.9700 EUR
Purchase         554                   59.6800
Purchase         117                   59.6800
Purchase         701                   60.4431
Purchase         309                   60.4431
Purchase         2,373                 60.9000
Purchase         425                   61.3201
Purchase         3,258                 60.9000
Purchase         386                   60.4431
Purchase         425                   60.9000
Purchase         270                   60.4431
Purchase         211                   59.6800
Purchase         171                   60.4431
Purchase         601                   60.4431
Purchase         128                   60.9000
Sale             13,100                60.8279
Sale             151                   58.7084
Sale             347                   60.5500
Sale             131                   Transfer
Sale             304                   Transfer
Sale             741                   59.9906
Sale             2,400                 61.0417
Sale             1,862                 59.9000
Sale             19,600                60.1110
Sale             70                    60.8830
Sale             538                   59.9000
Sale             1,862                 59.9000
Sale             790                   59.9000
Sale             6,487                 60.6592
Sale             19,600                60.1110
Sale             3,400                 58.8500
Sale             11,200                60.7852
Sale             6,500                 58.9995
Sale             574                   59.9000
Sale             1,865                 59.9000
Sale             132                   Transfer
Sale             11,912                60.7549
Sale             1,631                 59.9000
Sale             513                   59.9000
Sale             32                    76.8500 EUR
Sale             80                    60.6760
Sale             50                    61.3000
Sale             37,691                60.9000
Sale             7,695                 60.9000
Sale             108,                  625 60.9000
Sale             175                   61.4915
Sale             110                   61.2400
Sale             75                    60.1431
Sale             100                   60.8800
Sale             60                    60.5615
Sale             110                   60.8400
Sale             550                   60.6800
Sale             222                   60.4325
Sale             3,409                 60.4325
Sale             211                   61.3738
Sale             258                   59.9400
Sale             114,666               60.4719
Sale             616                   60.5000
Sale             314                   60.4325
Sale             500                   59.9910
Sale             3,200                 60.8131
Sale             3,800                 60.7876
Sale             263                   Transfer
Sale             3,303                 60.8639
Sale             451                   60.4325
Sale             1,658                 59.9000
Sale             1,087                 59.9000
Sale             100                   60.8015


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          6500          58.9995
CFD            Long          500           59.991
CFD            Long          114666        60.4718
CFD            Long          6487          60.6591
CFD            Long          11200         60.7852
CFD            Long          3800          60.7876
CFD            Long          170           60.7938
CFD            Long          3200          60.8131
CFD            Long          13100         60.8279
CFD            Long          3303          60.8639
CFD            Long          2400          61.0417
CFD            Long          211           61.3738
CFD            Short         100           58.9097
CFD            Short         9917          60.1483
CFD            Short         6113          60.1861
CFD            Short         27255         60.423
CFD            Short         8228          60.5122
CFD            Short         39000         60.9136
CFD            Short         2495          60.9617
CFD            Short         2725          60.99
CFD            Short         18318         61.0086

(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                         18 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