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               09 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      47,232,941      4.73%       637,675      0.06%
securities
(2) Derivatives    2,734,235      0.27%       269,199      0.03%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             50,069,137      5.02%     1,248,454      0.13%


(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         165                   59.1700
Purchase         86                    60.0200
Purchase         7,111                 59.2141
Purchase         7,875                 58.7000
Purchase         3,150                 58.7000
Purchase         9                     60.3725
Purchase         20,000                60.2904
Purchase         143                   60.4271
Purchase         5,141                 58.7000
Purchase         162                   60.4271
Purchase         11,700                59.4670
Purchase         25,591                59.2513
Purchase         9,700                 59.0984
Purchase         18,439                59.0251
Purchase         11,700                59.4670
Purchase         49,700                59.5443
Purchase         150                   58.7370
Purchase         24,757                58.7000
Purchase         168                   58.7000
Purchase         3,704                 58.7000
Purchase         132                   59.0500
Purchase         4,100                 59.1828
Purchase         12,035                58.9223
Purchase         20                    60.3725
Purchase         1,153                 58.7000
Purchase         796                   59.4800
Purchase         720                   58.7000
Purchase         33                    73.8100 EUR
Sale             39,172                59.0634
Sale             6,500                 59.4832
Sale             165                   59.1900
Sale             165                   59.1700
Sale             6,208                 59.1103
Sale             12                    Transfer
Sale             54                    Transfer
Sale             162                   60.4271
Sale             49                    Transfer
Sale             100                   59.2919
Sale             195                   58.7000
Sale             187                   58.9100
Sale             1,909                 58.7000
Sale             115                   59.3405
Sale             200                   58.6030
Sale             61                    58.7644
Sale             41,312                58.7000
Sale             11,700                59.4670
Sale             150                   59.3805
Sale             19,467                58.7174
Sale             1,153                 58.7000
Sale             250                   59.6460
Sale             540                   59.3819
Sale             160                   59.1618
Sale             78                    59.2600
Sale             17,105                58.9917
Sale             1,832                 59.0961
Sale             3,134                 58.7000

(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         58.7
CFD            Long          19467         58.7174
CFD            Long          17105         58.9917
CFD            Long          39172         59.0634
CFD            Long          1832          59.0961
CFD            Long          6208          59.1103
CFD            Long          6500          59.4832
CFD            Short         1282          58.6883
CFD            Short         12035         58.9223
CFD            Short         18439         59.0251
CFD            Short         9700          59.0984
CFD            Short         4100          59.1827
CFD            Short         7111          59.2141
CFD            Short         25591         59.2513
CFD            Short         169           59.2572
CFD            Short         11700         59.467
CFD            Short         49700         59.5443
CFD            Short         20000         60.2903

(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                         10 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