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               19 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      46,937,202      4.70%     1,325,385      0.13%
securities
(2) Derivatives    2,514,129      0.25%        30,845      0.00%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,497,981      4.96%     1,457,040      0.15%


(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      1,638                    57.8725
Purchase      416                      58.2229
Purchase      175                      58.2229
Purchase      160                      58.3400
Purchase      354                      58.2229
Purchase      4,100                    58.0327
Purchase      1,270                    58.2229
Purchase      2,152                    58.2229
Purchase      2,943                    58.3093
Purchase      268                      58.2229
Purchase      29,407                   58.4785
Purchase      849                      58.2229
Purchase      234                      58.2229
Purchase      696                      58.2229
Purchase      221                      58.2700
Purchase      624                      57.9200
Purchase      1,648                    58.2456
Purchase      150,000                  44.0000
Purchase      32,479                   58.2859
Purchase      125                      Transfer
Purchase      5,329                    57.6509
Purchase      1,048                    58.2229
Purchase      4,350                    58.5000
Purchase      221                      58.3500
Sale          115                      57.6428
Sale          100                      58.3500
Sale          250                      58.1550
Sale          305                      58.1800
Sale          589                      58.2500
Sale          150                      58.1850
Sale          120                      58.3225
Sale          150                      57.7475
Sale          110                      58.1224
Sale          50                       58.3500
Sale          120                      58.3500
Sale          69                       58.2500
Sale          353                      58.1200
Sale          145                      57.6500
Sale          400                      58.1800
Sale          165                      58.2124
Sale          67                       58.2500
Sale          100                      58.3500
Sale          135                      57.8016
Sale          125                      58.3320
Sale          50                       58.0450
Sale          360                      58.1800
Sale          200                      58.3500
Sale          21,176                   57.7997
Sale          200                      58.3500
Sale          7,200                    58.2182
Sale          150                      58.3500
Sale          40                       58.1800
Sale          85                       57.6512
Sale          200                      57.7400
Sale          780                      57.7732
Sale          204                      57.7732
Sale          60                       58.1550
Sale          90                       58.2500
Sale          624                      57.9012
Sale          75                       58.3500
Sale          1,146                    58.3296
Sale          195                      58.6000
Sale          13,000                   58.5000
Sale          63                       58.4100
Sale          100                      58.2032
Sale          100                      58.3500
Sale          50                       58.5900
Sale          72                       58.2500
Sale          363                      57.7732
Sale          387                      58.5000
Sale          50                       58.1524
Sale          75                       58.3500
Sale          75                       58.3500
Sale          233                      58.2500
Sale          180                      58.3500
Sale          36,321                   58.1974
Sale          140                      58.4650
Sale          950                      58.1500
Sale          31                       56.4100
Sale          90                       58.0626
Sale          186                      58.2500
Sale          68                       57.6350
Sale          2,709                    58.1420
Sale          1,071                    57.9894
Sale          2,500                    58.1700
Sale          210                      58.1000
Sale          85                       58.1312
Sale          50                       58.5750
Sale          73                       58.0275
Sale          100                      57.5908
Sale          2,145                    58.2500
Sale          520                      57.7732
Sale          160                      58.0100
Sale          6,235                    58.3645
Sale          624                      57.9200
Sale          99                       58.2500
Sale          4,124                    58.3341
Sale          60                       58.0200
Sale          221                      58.2700
Sale          80                       58.0550
Sale          50                       58.0876
Sale          740                      58.2500
Sale          110                      58.1250
Sale          175                      57.9300

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         5329          57.6509
CFD            Short         1638          57.8725
CFD            Short         4100          58.0326
CFD            Short         1648          58.2455
CFD            Short         2943          58.3093
CFD            Short         29407         58.4784
CFD            Long          1071          57.9894
CFD            Long          2709          58.142
CFD            Long          36321         58.1974
CFD            Long          7200          58.2182
CFD            Long          1146          58.3295
CFD            Long          4124          58.3341
CFD            Long          6235          58.3645


(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)
CALL              Selling          150                44          EURO         20/03/08     0

(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                         20 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