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               10 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      47,127,851      4.72%       943,247      0.09%
securities
(2) Derivatives      667,374      0.07%     1,741,791      0.17%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,896,425      4.80%     2,686,068      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         8,797                 54.3504
Purchase         58,898                54.4076
Purchase         26,789                54.3766
Purchase         1,309                 54.2109
Purchase         168,449               53.9500
Purchase         168,449               53.9500
Purchase         109,988               54.0623
Purchase         7,733                 54.1475
Purchase         1,009                 53.7021
Purchase         210,562               53.6700
Purchase         13                    54.1774
Purchase         2,204                 54.8000
Purchase         31,600                54.4076
Purchase         15,039                54.3457
Purchase         245                   54.1269
Purchase         1,185                 54.8000
Purchase         131                   54.8000
Purchase         990                   53.4100
Purchase         55                    54.2916
Sale             370                   54.8000
Sale             210,562               Transfer
Sale             21,529                54.5050
Sale             23,135                54.0673
Sale             1,156                 53.3288
Sale             168,449               53.9500
Sale             311                   54.0791
Sale             2,108                 54.2300
Sale             91                    54.8000
Sale             15,934                54.3745
Sale             210,562               53.6700
Sale             7,486                 54.1982
Sale             1,968                 54.5479
Sale             34                    Transfer
Sale             325                   54.0000
Sale             4,211                 54.8000
Sale             125                   54.1442
Sale             4,856                 54.7932
Sale             3,300                 54.8000
Sale             15,200                54.0712
Sale             29,018                54.5072
Sale             865                   54.1028
Sale             23,347                53.9804
Sale             12,990                54.3281
Sale             200                   54.5484
Sale             100                   54.3663
Sale             31                    53.0005
Sale             75                    54.2427
Sale             3,836                 54.1696
Sale             95                    52.9632
Sale             24                    54.8905

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          23347         53.9803
CFD            Long          23135         54.0672
CFD            Long          15200         54.0711
CFD            Long          865           54.1028
CFD            Long          3836          54.1696
CFD            Long          7486          54.1981
CFD            Long          12990         54.328
CFD            Long          15934         54.3745
CFD            Long          21529         54.505
CFD            Long          4856          54.7931
CFD            Short         1709          54.0514
CFD            Short         109988        54.0622
CFD            Short         339           54.0629
CFD            Short         7733          54.1475
CFD            Short         1309          54.2109
CFD            Short         15039         54.3456
CFD            Short         8797          54.3504
CFD            Short         26789         54.3766
CFD            Short         90498         54.4076
CFD            Short         6792          54.7891

(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                         11 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