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               11 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      47,078,395      4.72%       899,900      0.09%
securities
(2) Derivatives      620,703      0.06%     1,612,397      0.16%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,800,298      4.79%     2,513,327      0.25%

(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         12,913                54.3440
Purchase         234                   54.1745
Purchase         516                   54.1745
Purchase         534                   54.1745
Purchase         186                   55.2300
Purchase         623                   55.2300
Purchase         1,283                 54.1745
Purchase         1,158                 55.5513
Purchase         80                    54.1880
Purchase         10,476                54.3443
Purchase         192                   54.1745
Purchase         7,727                 54.1621
Purchase         1,695                 54.1745
Purchase         3,084                 54.6424
Purchase         32,400                53.4492
Purchase         8,000                 55.1200
Purchase         14,760                54.0804
Purchase         40,000                54.1589
Purchase         2,945                 54.5793
Purchase         11,858                54.6768
Purchase         4,856                 54.4787
Purchase         2,242                 54.1875
Purchase         91                    53.4200
Purchase         40,000                54.3363
Purchase         1,407                 53.4200
Purchase         515                   54.1745
Purchase         5,656                 54.1745
Purchase         309                   54.1745
Purchase         6,371                 54.1600
Purchase         63,404                53.4200
Purchase         182                   54.1745
Purchase         786                   54.1745
Purchase         278                   55.2300
Purchase         492                   54.2017
Purchase         356                   55.2300
Purchase         990                   53.4100
Purchase         665                   54.1745
Purchase         70                    55.2300
Purchase         2,204                 53.4200
Purchase         164                   54.1745
Purchase         556                   54.1745
Purchase         533                   54.1745
Purchase         217                   54.1745
Sale             339                   54.5399
Sale             1,715                 54.4100
Sale             6,371                 54.1600
Sale             1,318                 53.8068
Sale             800                   54.7818
Sale             32                    55.1800
Sale             1,554                 54.2472
Sale             150                   54.1542
Sale             10,137                54.2802
Sale             281                   54.7540
Sale             43,042                54.1599
Sale             100                   55.5311
Sale             100                   55.5311
Sale             63,118                53.4200
Sale             5,562                 53.4200
Sale             3,597                 53.8720
Sale             1,000                 55.0500
Sale             50                    54.0904
Sale             95,804                54.3389
Sale             428                   55.0850
Sale             85                    55.5311
Sale             20,200                55.1230
Sale             47,041                55.1014
Sale             27                    54.5284
Sale             16,353                54.2116
Sale             37,579                54.3822
Sale             100                   53.3407

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          182           53.4307
CFD            Long          3641          53.9736
CFD            Long          43042         54.1598
CFD            Long          3151          54.2088
CFD            Long          16353         54.2116
CFD            Long          1554          54.2472
CFD            Long          10137         54.2802
CFD            Long          95804         54.3389
CFD            Long          37579         54.3821
CFD            Long          339           54.5399
CFD            Long          800           54.7817
CFD            Long          47041         55.1014
CFD            Long          20200         55.123
CFD            Short         32400         53.4491
CFD            Short         14760         54.0804
CFD            Short         40000         54.1589
CFD            Short         7727          54.1621
CFD            Short         2242          54.1875
CFD            Short         40000         54.3363
CFD            Short         12913         54.3439
CFD            Short         23429         54.3442
CFD            Short         4856          54.4786
CFD            Short         886           54.5149
CFD            Short         2945          54.5792
CFD            Short         3084          54.6424
CFD            Short         11858         54.6768

(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                         14 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