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               28 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      46,725,845       4.68%      884,786      0.09%
securities
(2) Derivatives      720,060       0.07%    1,787,561      0.18%
(other than
options)
(3) Options and        1,200       0.00%        1,300      0.00%
agreements to
purchase/sell
Total             47,547,105       4.76%    2,773,647      0.28%


(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         8,985                 50.8289
Purchase         5,532                 51.0447
Purchase         6,308                 50.8889
Purchase         23                    Transfer
Purchase         25,537                50.9598
Purchase         7,572                 50.7587
Purchase         400                   Transfer
Purchase         111                   Transfer
Purchase         28,338                51.0293
Purchase         400                   50.7524
Purchase         203                   49.2479
Purchase         83,946                50.7800
Purchase         203                   50.7700
Purchase         3,671                 50.2556
Purchase         189                   50.7500
Purchase         34,701                51.0000
Purchase         2,204                 51.0000
Purchase         5,510                 51.0000
Purchase         57                    50.9953
Purchase         670                   50.7500
Purchase         137                   48.5200
Purchase         2,392                 51.0000
Sale             4,517                 50.5600
Sale             150                   51.0805
Sale             17                    50.8868
Sale             202                   50.2884
Sale             361                   50.6800
Sale             53,552                50.6277
Sale             1,000                 51.2218
Sale             203                   49.2479
Sale             400                   50.5800
Sale             2,421                 50.9907
Sale             100                   50.9584
Sale             23                    Transfer
Sale             100                   50.9184
Sale             170                   Transfer
Sale             200                   51.0305
Sale             1,503                 51.0000
Sale             3,319                 50.7648
Sale             13,600                50.9597
Sale             400                   50.7524
Sale             135                   50.8463
Sale             85                    50.9642
Sale             225                   50.9763
Sale             7,198                 51.2201

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          53552         50.6277
CFD            Long          361           50.68
CFD            Long          400           50.7524
CFD            Long          3319          50.7647
CFD            Long          13600         50.9596
CFD            Long          2421          50.9907
CFD            Long          1503          51
CFD            Long          13887         51.0153
CFD            Long          7198          51.2201
CFD            Long          1000          51.2218
CFD            Short         400           50.7524
CFD            Short         7572          50.7586
CFD            Short         391           50.8138
CFD            Short         778           50.826
CFD            Short         8985          50.8289
CFD            Short         6308          50.8888
CFD            Short         25537         50.9598
CFD            Short         2579          50.9898
CFD            Short         28338         51.0293
CFD            Short         5532          51.0446

(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                         29 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   -270                   6,400.0000       EURO           19/12/2008
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