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               16 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      47,268,343       4.74%      911,949      0.09%
securities
(2) Derivatives      637,091       0.06%    1,696,749      0.17%
(other than
options)
(3) Options and      101,200       0.01%      101,030      0.00%
agreements to
purchase/sell
Total             48,006,634       4.81%    2,709,728      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         147,393               50.0671
Purchase         88,272                51.2916
Purchase         210,562               Transfer
Purchase         348                   49.7900
Purchase         100                   50.1100
Purchase         61                    53.3100
Purchase         19,586                50.2034
Purchase         4,100                 53.2346
Purchase         9,316                 50.1634
Purchase         8,655                 49.8314
Purchase         283                   49.5572
Purchase         16,719                52.2000
Purchase         6,890                 50.6801
Purchase         562                   53.1066
Purchase         42,112                49.9600
Purchase         21,800                53.2080
Purchase         15,929                51.8684
Purchase         10,000                50.2500
Purchase         335                   52.9600
Purchase         84,225                50.1100
Purchase         12,500                50.1365
Purchase         21                    52.2000
Purchase         21,056                50.1100
Purchase         23,000                50.1500
Purchase         16,740                50.2500
Purchase         1,044                 53.2642
Purchase         45,680                54.5700
Purchase         136                   52.3000
Purchase         136                   52.3000
Purchase         4,400                 50.2500
Purchase         12,338                50.2500
Purchase         3,306                 52.2000
Purchase         570                   50.2500
Purchase         850                   50.2500
Purchase         115,807               51.2772
Purchase         78                    53.3100
Sale             3,772                 52.4275
Sale             200                   50.1626
Sale             45,680                54.5700
Sale             37,065                50.1135
Sale             5,026                 49.9931
Sale             60                    52.0032
Sale             45,680                54.5700
Sale             210,562               Transfer
Sale             16,719                52.2000
Sale             57,258                53.4200
Sale             16,144                50.1268
Sale             63                    Transfer
Sale             40                    50.3685
Sale             100                   50.1100
Sale             100                   52.1140
Sale             50                    52.6200
Sale             7,086                 50.1555
Sale             147,393               50.0671
Sale             7,500                 52.0000
Sale             9,755                 50.2500
Sale             3,200                 50.2548
Sale             3,468                 50.7086
Sale             7,671                 49.6710
Sale             28                    52.8905
Sale             16,740                50.2500
Sale             13,887                50.2584
Sale             396                   53.2400
Sale             28,621                50.0885
Sale             21                    52.2000
Sale             100                   52.3200
Sale             200                   49.9200
Sale             60                    52.7712

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          7671          49.671
CFD            Long          200           49.92
CFD            Long          28621         50.0885
CFD            Long          100           50.11
CFD            Long          37065         50.1134
CFD            Long          16144         50.1268
CFD            Long          7086          50.1555
CFD            Long          3200          50.2548
CFD            Long          13887         50.2584
CFD            Long          4876          50.2601
CFD            Long          3468          50.7086
CFD            Long          2722          51.6504
CFD            Long          3772          52.4275
CFD            Short         283           49.5572
CFD            Short         8655          49.8314
CFD            Short         100           50.11
CFD            Short         12500         50.1364
CFD            Short         9316          50.1634
CFD            Short         19586         50.2034
CFD            Short         6890          50.6801
CFD            Short         115807        51.2771
CFD            Short         88272         51.2916
CFD            Short         15929         51.8683
CFD            Short         562           53.1066
CFD            Short         4100          53.2346

(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                         17 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