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               04 July 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      43,493,932      4.36%     2,426,093      0.24%
securities
(2) Derivatives    2,165,591      0.22%       179,606      0.02%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             45,760,723      4.58%     2,606,729      0.26%


(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         5,000                 54.3400
Purchase         70                    54.8200
Purchase         4,698                 57.6400
Purchase         500                   54.2392
Purchase         55                    54.2391
Purchase         220                   54.2391
Purchase         50                    54.6600
Purchase         794                   56.0000
Purchase         2,800                 55.0285
Purchase         70                    56.2700
Purchase         6,567                 54.1148
Purchase         60                    54.8360
Purchase         1,586                 53.9742
Purchase         59,808                54.3495
Purchase         715                   56.0000
Purchase         2,300                 54.7878
Purchase         55                    54.2391
Purchase         11,367                54.3882
Purchase         92                    54.2391
Sale             195                   55.1017
Sale             6,752                 55.9930
Sale             11,236                55.9192
Sale             1,408,270             56.0000
Sale             830                   54.2008
Sale             100                   53.9300
Sale             84,140                54.9891
Sale             1,110                 54.0600
Sale             276                   54.1100
Sale             2,000                 56.3100
Sale             100                   54.0100
Sale             715                   56.0000
Sale             2,183                 56.0000
Sale             184                   54.3502
Sale             3,882                 58.4300
Sale             1,597                 54.6466
Sale             100                   53.9300
Sale             120                   54.0000
Sale             150                   53.9300
Sale             560                   54.1600
Sale             215                   53.9300
Sale             100                   53.9300
Sale             460                   54.1508
Sale             150                   53.9300
Sale             150                   53.9300
Sale             100                   53.9300
Sale             250                   53.9300
Sale             200                   54.0000
Sale             120                   54.0000
Sale             120                   54.0000
Sale             150                   53.9300
Sale             100                   53.9300
Sale             1,125                 56.3845
Sale             130                   53.9300

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          84140         54.989
CFD            Long          195           55.1017
CFD            Long          11236         55.9192
CFD            Long          6752          55.993
CFD            Long          1408270       56
CFD            Long          2000          56.31
CFD            Long          1125          56.3844
CFD            Short         6567          54.1148
CFD            Short         6843          54.2114
CFD            Short         59808         54.3494
CFD            Short         11367         54.3882
CFD            Short         2300          54.7877
CFD            Short         684           54.7943
CFD            Short         2800          55.0285
CFD            Short         267           55.9888


(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                         07 July 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   100,000                56.0000          AMER           18/12/2009
Option            Purchased   500                    5,000.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           19/09/2008
Option            Purchased   -500                   7,000.0000       EURO           19/12/2008

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