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               08 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      46,711,452      4.68%       997,671      0.10%
securities
(2) Derivatives      733,015      0.07%     1,504,423      0.15%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,545,667      4.76%     2,503,124      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         126,337               53.5500
Purchase         4,200                 55.8000
Purchase         11,000                53.1343
Purchase         5,100                 54.6516
Purchase         186                   54.1554
Purchase         181                   52.6400
Purchase         13                    53.9516
Purchase         16,963                53.1442
Purchase         24,415                53.7791
Purchase         4,316                 52.6466
Purchase         7,423                 54.0260
Purchase         112,930               54.1110
Purchase         3,000                 53.9160
Purchase         42,112                53.5500
Purchase         3,000                 54.1817
Purchase         48                    54.8454
Purchase         3,201                 54.0444
Purchase         1,129                 53.8550
Purchase         453                   52.6400
Purchase         425                   52.6400
Purchase         425                   52.6400
Purchase         62                    52.6400
Purchase         168,449               53.5500
Purchase         127                   53.7900
Purchase         5                     53.8930
Purchase         46                    53.7637
Purchase         202                   Transfer
Purchase         1,611                 52.6400
Sale             202                   Transfer
Sale             311                   53.9000
Sale             5,192                 52.6400
Sale             10,180                53.7728
Sale             56,165                53.6207
Sale             59,761                53.8518
Sale             131                   Transfer
Sale             168,449               53.5500
Sale             12,011                53.5226
Sale             66                    54.8784
Sale             27,838                53.8510
Sale             120                   53.3324
Sale             2,752                 52.6400
Sale             85                    52.6400
Sale             7,623                 53.9133
Sale             1,129                 53.8550
Sale             40                    68.3700 EUR
Sale             115                   66.2100 EUR
Sale             13,754                52.6400
Sale             150                   54.2905
Sale             100                   53.1936
Sale             12,468                53.7701
Sale             181                   52.6400
Sale             317                   Transfer
Sale             245                   53.3821
Sale             35                    53.3600
Sale             335                   54.5800
Sale             100                   53.5636
Sale             87                    53.3621
Sale             130                   54.6040
Sale             10,302                52.6400
Sale             313                   53.6521
Sale             3,201                 54.0444
Sale             28,619                53.8175
Sale             24,601                52.6400

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          12011         53.5225
CFD            Long          56165         53.6207
CFD            Long          313           53.6521
CFD            Long          12468         53.7701
CFD            Long          10180         53.7727
CFD            Long          28619         53.8175
CFD            Long          27838         53.851
CFD            Long          59761         53.8518
CFD            Long          3201          54.0443
CFD            Short         4316          52.6465
CFD            Short         11000         53.1342
CFD            Short         16963         53.1441
CFD            Short         24415         53.779
CFD            Short         3000          53.916
CFD            Short         3201          54.0443
CFD            Short         112930        54.111
CFD            Short         3000          54.1817
CFD            Short         5100          54.6515
CFD            Short         48            54.8454


(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                         09 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