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               10 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      47,084,575      4.72%       608,338      0.06%
securities
(2) Derivatives    2,770,065      0.28%       295,386      0.03%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             49,956,601      5.01%     1,245,304      0.12%


(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         70                    57.6069
Purchase         13,537                57.8597
Purchase         2,772                 57.5063
Purchase         65                    57.4968
Purchase         490                   Transfer
Purchase         44,229                57.6496
Purchase         2,612                 57.8275
Purchase         50                    57.6400
Purchase         70                    57.5564
Purchase         28                    Transfer
Purchase         2,200                 57.4764
Purchase         2,111                 58.4868
Purchase         14,725                57.6393
Purchase         172                   57.8275
Purchase         26,800                57.4318
Purchase         34                    2.5000 EUR
Purchase         6,900                 57.5430
Purchase         60,000                57.3716
Purchase         400                   57.5785
Purchase         12,700                57.4487
Purchase         50                    57.3368
Purchase         32,177                57.3354
Purchase         2,772                 57.5063
Purchase         776                   58.7000
Sale             60,000                57.3716
Sale             40                    Transfer
Sale             5,000                 57.2900
Sale             100                   57.4200
Sale             32                    57.8790
Sale             110                   57.7052
Sale             1,600                 58.4981
Sale             8,900                 57.7379
Sale             7,334                 58.3057
Sale             60,000                57.3716
Sale             150                   57.4190
Sale             33                    58.3112
Sale             509                   57.3228
Sale             1,165                 57.6173
Sale             15,612                57.4575
Sale             84                    57.8790
Sale             800                   58.4092
Sale             84                    58.0405
Sale             100                   57.5514
Sale             2,772                 57.5077
Sale             170                   Transfer
Sale             709                   57.4134
Sale             65                    57.6831
Sale             60                    57.4830
Sale             135                   57.5015
Sale             300                   57.7100
Sale             120                   57.4660
Sale             49                    57.1241
Sale             1,096                 57.4134
Sale             1,685                 57.4134
Sale             50                    57.7612
Sale             850                   57.4134
Sale             3,845                 57.4134
Sale             1,600                 57.4134
Sale             71,093                57.2900
Sale             38,430                58.7000
Sale             827                   57.9457
Sale             25                    72.6600 EUR
Sale             265                   57.6000
Sale             100                   57.3300
Sale             36,127                57.7510
Sale             392                   57.4134
Sale             181                   57.3228
Sale             2,311                 57.9457
Sale             487                   57.9457
Sale             105                   57.8640
Sale             65                    57.7415
Sale             60                    57.9817
Sale             229                   57.3228
Sale             511                   57.3228
Sale             2,326                 57.9457
Sale             385                   57.3228
Sale             3,175                 57.2900
Sale             41,312                57.2900
Sale             85                    58.0475
Sale             456                   57.4134

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          41312         57.29
CFD            Long          60000         57.3715
CFD            Long          15612         57.4574
CFD            Long          100           57.5514
CFD            Long          34            57.6073
CFD            Long          1165          57.6173
CFD            Long          8900          57.7379
CFD            Long          36127         57.751
CFD            Long          33            58.3112
CFD            Long          800           58.4092
CFD            Long          1600          58.4981
CFD            Short         32177         57.3353
CFD            Short         26800         57.4317
CFD            Short         12700         57.4487
CFD            Short         2200          57.4764
CFD            Short         2772          57.5062
CFD            Short         6900          57.5429
CFD            Short         14725         57.6393
CFD            Short         44229         57.6495
CFD            Short         13537         57.8596

(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                         11 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