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               22 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      46,280,076       4.64%      958,403      0.10%
securities
(2) Derivatives      743,531       0.07%    1,613,776      0.16%
(other than
options)
(3) Options and      101,200       0.01%      101,030      0.00%
agreements to
purchase/sell
Total             47,124,807       4.72%    2,673,209      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         16,719                52.2000
Purchase         90                    52.1174
Purchase         1,539                 50.9000
Purchase         21,114                50.9000
Purchase         31,427                50.9000
Purchase         100                   52.2200
Purchase         2,396                 51.6273
Purchase         2,039                 51.8423
Purchase         21                    52.2000
Purchase         10,252                51.0952
Purchase         1,250                 52.3500
Purchase         741                   50.9000
Purchase         4,695                 52.7522
Purchase         75                    50.9364
Purchase         200                   52.7200
Purchase         377                   51.4519
Purchase         2,817                 51.5813
Purchase         1,000                 52.3500
Purchase         28                    Transfer
Purchase         862                   52.7776
Purchase         3,459                 51.4407
Purchase         1,383                 52.7522
Purchase         2,039                 51.8410
Purchase         2,068                 52.7522
Purchase         5,000                 51.4422
Purchase         195                   52.1263
Purchase         385                   50.9000
Purchase         331                   52.4698
Purchase         3,011                 50.9000
Purchase         2,748                 52.1263
Purchase         16,740                50.9000
Purchase         3,303                 50.9000
Purchase         236                   50.9000
Purchase         914                   50.9000
Purchase         850                   50.9000
Sale             337                   52.2514
Sale             401                   52.5805
Sale             16,719                52.2000
Sale             16,740                50.9000
Sale             28                    Transfer
Sale             193                   52.7706
Sale             3,296                 51.3979
Sale             87                    51.4300
Sale             4,279                 50.9000
Sale             9                     51.0926
Sale             10                    52.2826
Sale             100                   51.9084
Sale             536                   52.1254
Sale             643                   52.2514
Sale             4,300                 50.8919
Sale             500                   52.2908
Sale             17,662                50.8919
Sale             12,599                51.9436
Sale             21                    52.2000
Sale             11,531                52.2000
Sale             50                    52.1784
Sale             581                   52.1254
Sale             339                   52.1254
Sale             203                   52.2514
Sale             464                   52.1254
Sale             463                   52.1254
Sale             268                   52.1254
Sale             231                   52.1254
Sale             255                   52.1254
Sale             613                   52.1254
Sale             3,301                 52.1254
Sale             10,267                52.1254
Sale             190                   52.1254
Sale             90                    52.1424
Sale             58,391                52.3115
Sale             980                   52.1254
Sale             875                   52.1254
Sale             4,183                 52.4374
Sale             4,717                 51.2924
Sale             270                   52.2514
Sale             152                   51.3500
Sale             1,590                 52.1254
Sale             68,108                51.6036
Sale             264                   52.2514
Sale             32,832                51.5768
Sale             1,103                 52.1254
Sale             100                   52.2200
Sale             441                   52.8608
Sale             62                    52.3148
Sale             248                   52.2514
Sale             2,039                 51.8423

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          21962         50.8918
CFD            Long          4717          51.2923
CFD            Long          152           51.35
CFD            Long          3296          51.3978
CFD            Long          32832         51.5768
CFD            Long          68108         51.6035
CFD            Long          12599         51.9436
CFD            Long          100           52.22
CFD            Long          500           52.2908
CFD            Long          58391         52.3114
CFD            Long          4183          52.4373
CFD            Long          401           52.5804
CFD            Short         4440          50.8899
CFD            Short         10252         51.0951
CFD            Short         3459          51.4407
CFD            Short         5000          51.4422
CFD            Short         377           51.4519
CFD            Short         2817          51.5812
CFD            Short         2396          51.6273
CFD            Short         2039          51.8422
CFD            Short         100           52.22
CFD            Short         1447          52.4842
CFD            Short         440           52.5032
CFD            Short         200           52.72
CFD            Short         862           52.7775
CFD            Short         3087          52.845

(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                         23 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   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
Option            Purchased   -100,000               64.0000          AMER           21/11/2008

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