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               17 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      47,311,380       4.74%      941,022      0.09%
securities
(2) Derivatives      683,094       0.07%     1,823,782     0.18%
(other than
options)
(3) Options and      101,200       0.01%      101,030      0.00%
agreements to
purchase/sell
Total             48,095,674       4.82%    2,865,834      0.29%


(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         2,034                 50.8895
Purchase         54                    Transfer
Purchase         1,210                 51.0815
Purchase         1,210                 51.0815
Purchase         6,200                 51.0099
Purchase         16,469                51.4509
Purchase         120                   52.9100
Purchase         32,386                51.2062
Purchase         100                   51.0558
Purchase         2,034                 53.3477
Purchase         191                   51.7500
Purchase         82,800                50.8627
Purchase         17,387                51.3209
Purchase         7,291                 51.0914
Purchase         49                    Transfer
Purchase         15,008                51.0467
Purchase         54                    50.1574
Purchase         3,000                 51.2727
Purchase         100                   51.6800
Purchase         29,594                50.9605
Purchase         2,669                 50.8190
Purchase         150                   51.7490
Purchase         425                   51.3500
Purchase         45                    64.1700 EUR
Sale             1,210                 51.0828
Sale             6,973                 51.0897
Sale             2,034                 53.3477
Sale             362                   50.9557
Sale             266                   50.9200
Sale             118                   50.4300
Sale             120                   50.4600
Sale             63                    Transfer
Sale             1,625                 51.3436
Sale             47,611                51.4638
Sale             100                   51.6800
Sale             29,328                51.7036
Sale             15,593                51.2425
Sale             85                    50.7321
Sale             120                   52.9100
Sale             15,987                50.9503
Sale             784                   51.1139
Sale             26,576                51.3500
Sale             135                   50.8926
Sale             120                   50.8800
Sale             100                   50.9140
Sale             50                    50.9132
Sale             110                   50.9308
Sale             55                    51.5724
Sale             225                   50.9557
Sale             70                    51.8406
Sale             158                   51.3500
Sale             568                   51.1832
Sale             268                   50.9557
Sale             25,856                51.3500
Sale             238                   50.9426
Sale             130                   50.7105
Sale             98                    51.0100
Sale             102                   49.9426
Sale             1,000                 50.6200
Sale             185                   50.7836
Sale             120                   50.8620

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          98            51.01
CFD            Long          6973          51.0896
CFD            Long          311           51.1186
CFD            Long          15328         51.1288
CFD            Long          568           51.1831
CFD            Long          15593         51.2424
CFD            Long          1625          51.3435
CFD            Long          47611         51.4637
CFD            Long          100           51.68
CFD            Long          29328         51.7036
CFD            Short         82800         50.8627
CFD            Short         29594         50.9605
CFD            Short         8373          51.0419
CFD            Short         15008         51.0466
CFD            Short         1210          51.0815
CFD            Short         7291          51.0913
CFD            Short         32386         51.2061
CFD            Short         3000          51.2727
CFD            Short         2143          51.3398
CFD            Short         16469         51.4508
CFD            Short         100           51.68
CFD            Short         191           51.75

(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                         18 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   -100,000               64.0000          AMER           21/11/2008
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