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               21 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      46,423,333       4.65%      853,825      0.09%
securities
(2) Derivatives      684,998       0.07%    1,725,568      0.17%
(other than
options)
(3) Options and      101,200       0.01%      101,030      0.00%
agreements to
purchase/sell
Total             47,209,531       4.73%    2,680,423      0.27%


(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         8,821                 51.5298
Purchase         377                   52.2000
Purchase         175                   51.6244
Purchase         850                   52.2000
Purchase         3,539                 51.5672
Purchase         58,280                51.8435
Purchase         22,151                51.8355
Purchase         1,153                 51.6898
Purchase         1,160                 52.2000
Purchase         81,079                51.6200
Purchase         74                    52.8395
Purchase         12,093                51.7221
Purchase         2,863                 51.6029
Purchase         1,557                 51.5476
Purchase         400                   51.8600
Purchase         1,277                 51.8379
Purchase         21,301                52.2512
Purchase         300                   51.6040
Purchase         2,500                 51.3777
Purchase         4,500                 52.0006
Purchase         496                   52.2000
Purchase         1,102                 52.2000
Purchase         11,531                51.5483
Purchase         19,534                50.7000
Purchase         36,389                50.7000
Purchase         20,899                50.7000
Purchase         4,257                 50.7000
Purchase         290                   52.2000
Sale             157                   52.2000
Sale             87                    49.4340
Sale             11,531                51.5482
Sale             50                    51.6500
Sale             19,969                51.7581
Sale             21                    49.5026
Sale             150                   51.6500
Sale             506                   51.5310
Sale             100                   65.0000 EUR
Sale             100                   52.5084
Sale             1,999                 51.5123
Sale             1,000                 52.0017
Sale             309                   52.2000
Sale             119,619               51.7078
Sale             81,079                51.6200
Sale             90                    51.7300
Sale             478                   51.6600
Sale             1,000                 51.5095
Sale             3,500                 52.2000
Sale             150                   52.6542
Sale             120                   51.6500
Sale             150                   51.6040
Sale             150                   51.6500
Sale             75                    51.6500
Sale             75                    51.7300
Sale             400                   51.8600
Sale             300                   51.6967
Sale             81,079                51.6200
Sale             2,396                 52.1935
Sale             200                   51.8024
Sale             100                   52.2705
Sale             3,507                 51.5236
Sale             49                    51.7249
Sale             100                   51.6500
Sale             250                   51.7300
Sale             50                    51.6500
Sale             4,400                 51.8100
Sale             100                   51.6500
Sale             75                    51.7300

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          1000          51.5095
CFD            Long          1999          51.5122
CFD            Long          3507          51.5235
CFD            Long          506           51.5309
CFD            Long          300           51.6966
CFD            Long          119619        51.7078
CFD            Long          49            51.7248
CFD            Long          19969         51.758
CFD            Long          4400          51.81
CFD            Long          400           51.86
CFD            Long          1000          52.0016
CFD            Long          2396          52.1934
CFD            Short         2500          51.3777
CFD            Short         3539          51.5671
CFD            Short         3047          51.5696
CFD            Short         2863          51.6029
CFD            Short         300           51.604
CFD            Short         12093         51.7221
CFD            Short         432           51.7769
CFD            Short         22151         51.8354
CFD            Short         1277          51.8379
CFD            Short         8060          51.842
CFD            Short         58280         51.8434
CFD            Short         400           51.86
CFD            Short         4500          52.0006
CFD            Short         21301         52.2512

(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                         22 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.
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

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   -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
Option            Purchased   -100,000               64.0000          AMER           21/11/2008
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

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