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               06 February 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      47,273,311      4.74%    1,335,658       0.13%
securities
(2) Derivatives    2,487,584      0.25%       87,763       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             49,808,695      4.99%     2,124,231      0.21%


(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          8,275                     54.0114
Purchase          100                       72.0000 EUR
Purchase          36,978                    53.7634
Purchase          3,378                     54.4155
Purchase          75                        72.7000 EUR
Purchase          1,141                     53.7000
Purchase          2,500                     53.6000
Purchase          9,348                     54.1700
Purchase          58,467                    54.1583
Purchase          23,000                    54.1700
Purchase          2,390                     54.1170
Purchase          493                       54.1700
Purchase          37,016                    54.0808
Purchase          1,154                     53.6581
Purchase          18,487                    53.8268
Sale              1,600                     53.9484
Sale              65                        54.2425
Sale              36,978                    53.7634
Sale              100                       54.3150
Sale              60                        54.2425
Sale              367                       54.1125
Sale              90                        54.1776
Sale              50                        54.2426
Sale              330                       54.0200
Sale              160                       54.2425
Sale              554                       54.1600
Sale              128                       54.4175
Sale              1,500                     54.0200
Sale              50                        54.0026
Sale              2,500                     53.6000
Sale              55                        54.1875
Sale              228                       53.6325
Sale              30                        53.8900
Sale              13,940                    54.2240
Sale              36,978                    53.7634
Sale              500                       54.0200
Sale              26,823                    53.7910
Sale              50                        54.2426
Sale              29                        54.6450
Sale              130                       53.9800
Sale              10                        54.1175
Sale              100                       72.5000 EUR
Sale              500                       54.0200
Sale              25                        54.0625
Sale              500                       54.0200
Sale              49                        54.1650
Sale              200                       54.6225
Sale              109                       54.1175
Sale              60                        53.9875
Sale              42                        54.0800
Sale              5,526                     54.1700
Sale              8,548                     54.1057
Sale              581                       53.9561
Sale              250                       54.0200
Sale              204                       53.7027
Sale              50                        54.2050
Sale              26,834                    53.9507

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1154          53.658
CFD            Short         8270          54.0109
CFD            Short         37016         54.0808
CFD            Short         2390          54.117
CFD            Short         58467         54.1583
CFD            Short         3378          54.4155
CFD            Short         5             54.754
CFD            Long          204           53.7027
CFD            Long          26823         53.7909
CFD            Long          1600          53.9484
CFD            Long          26834         53.9507
CFD            Long          8548          54.1056

(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                         07 February 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   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   150                    4,400.0000       EURO           20/03/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008

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