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               23 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      46,774,435       4.69%      792,233      0.08%
securities
(2) Derivatives      564,670       0.06%    1,640,659      0.16%
(other than
options)
(3) Options and      101,200       0.01%      101,030      0.00%
agreements to
purchase/sell
Total             47,440,305       4.75%    2,533,922      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         8,667                 50.6287
Purchase         1,150                 Transfer
Purchase         10,528                51.0100
Purchase         71,948                50.7738
Purchase         8,187                 50.6201
Purchase         126,337               51.1400
Purchase         1,638                 50.9000
Purchase         42,112                51.0100
Purchase         22,618                50.7061
Purchase         305,314               51.0638
Purchase         200                   51.0500
Purchase         42,112                51.0100
Purchase         35,027                50.7497
Purchase         5,500                 50.8154
Purchase         100,000               50.3801
Purchase         11,791                51.0000
Purchase         100                   51.1200
Purchase         1,073,862             Transfer
Purchase         20,135                50.9319
Purchase         1,000                 50.6176
Purchase         6,595                 51.1616
Purchase         300                   51.0500
Purchase         84,225                51.0100
Purchase         960                   51.8059
Purchase         250                   51.2295
Purchase         1,680                 51.8059
Purchase         48                    50.6452
Purchase         48                    50.6452
Purchase         120                   51.8063
Purchase         7,931                 51.0000
Purchase         1,488                 51.0000
Purchase         1,101                 51.9200
Purchase         1,275                 51.0000
Purchase         257                   51.8064
Sale             47,095                50.6165
Sale             1,638                 50.9000
Sale             75                    50.9605
Sale             9,295                 50.5371
Sale             2,080                 50.9936
Sale             13,557                50.4543
Sale             494                   51.4619
Sale             576                   51.0600
Sale             86                    51.9200
Sale             535                   50.9378
Sale             305,314               51.0638
Sale             15,045                51.0000
Sale             50                    51.2184
Sale             100                   51.1200
Sale             160                   50.6000
Sale             40                    50.8184
Sale             160                   51.1200
Sale             60                    51.0132
Sale             1,000                 50.5574
Sale             1,350                 50.4844
Sale             14,400                50.6104
Sale             517                   Transfer
Sale             140                   51.3446
Sale             920                   50.8328
Sale             1,073,862             Transfer
Sale             9,596                 50.6870
Sale             2,000                 50.9119

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          13557         50.4542
CFD            Long          1000          50.5574
CFD            Long          14400         50.6104
CFD            Long          47095         50.6164
CFD            Long          9596          50.6869
CFD            Long          920           50.8328
CFD            Long          1638          50.9
CFD            Long          2000          50.9118
CFD            Long          2080          50.9936
CFD            Long          100           51.12
CFD            Short         100000        50.3801
CFD            Short         1000          50.6175
CFD            Short         22618         50.7061
CFD            Short         35027         50.7497
CFD            Short         3759          50.769
CFD            Short         71948         50.7737
CFD            Short         5500          50.8154
CFD            Short         7416          50.8946
CFD            Short         1638          50.9
CFD            Short         20135         50.9319
CFD            Short         12823         50.9674
CFD            Short         9571          50.9898
CFD            Short         100           51.12
CFD            Short         6595          51.1616

(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                         24 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)


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