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               20 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      46,933,140      4.70%     1,277,771      0.13%
securities
(2) Derivatives    2,473,623      0.25%        51,088      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,453,413      4.96%     1,429,669      0.14%


(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      130                      57.3360
Purchase      7,496                    57.0105
Purchase      100                      57.3360
Purchase      1,000                    57.0584
Purchase      2,000                    57.3560
Purchase      12,216                   57.1923
Purchase      11,699                   56.8733
Purchase      445                      56.3703
Purchase      3,338                    57.2000
Purchase      33,490                   56.9577
Purchase      9,600                    57.0148
Sale          130                      57.3412
Sale          85                       57.3800
Sale          150                      57.1825
Sale          2,630                    57.3352
Sale          100                      57.4225
Sale          100                      57.2025
Sale          75                       57.3400
Sale          100                      56.8240
Sale          50                       57.3176
Sale          815                      56.6997
Sale          100                      56.9828
Sale          120                      57.3400
Sale          200                      57.0700
Sale          60                       57.0700
Sale          130                      57.0700
Sale          89                       56.9675
Sale          5,003                    57.2000
Sale          5,767                    57.1720
Sale          23,258                   57.2000
Sale          109                      57.3400
Sale          13,584                   57.2000
Sale          125                      57.2316
Sale          50                       57.4276
Sale          2,795                    57.2000
Sale          120                      57.0700
Sale          150                      57.2200
Sale          16,980                   57.2000
Sale          245                      57.4600
Sale          3,006                    57.2750
Sale          100                      57.2400
Sale          75                       57.3351
Sale          21                       57.3575
Sale          520                      57.2000
Sale          125                      57.1675
Sale          45                       57.0700
Sale          199                      57.3575
Sale          260                      57.1725
Sale          120                      57.0700
Sale          7,985                    56.9342

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         445           56.3703
CFD            Short         11699         56.8733
CFD            Short         33490         56.9577
CFD            Short         7496          57.0105
CFD            Short         9600          57.0147
CFD            Short         1000          57.0584
CFD            Short         12216         57.1922
CFD            Short         2000          57.356
CFD            Long          815           56.6996
CFD            Long          7985          56.9341
CFD            Long          5767          57.172
CFD            Long          2630          57.3352


(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                         21 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   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           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