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               27 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      46,596,606      4.67%     1,240,413      0.12%
securities
(2) Derivatives    2,399,058      0.24%        56,547      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,042,314      4.92%      1,397,770     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      540                      57.8738
Purchase      78,379                   58.0139
Purchase      2,214                    58.3500
Purchase      456                      57.5900
Purchase      607                      57.4701
Purchase      1,066                    57.5900
Purchase      485                      57.8811
Purchase      435                      57.5900
Purchase      2,125                    58.3500
Purchase      13,500                   57.9504
Purchase      156                      57.4000
Purchase      798                      57.8734
Purchase      696                      58.3500
Purchase      347                      57.8822
Purchase      24,442                   57.9899
Purchase      1,319                    57.8743
Purchase      4,168                    57.8421
Purchase      235                      58.3871
Purchase      174                      57.8822
Purchase      4,908                    58.3500
Purchase      643                      57.5900
Sale          42                       58.2912
Sale          93                       57.9300
Sale          165                      57.3325
Sale          403                      58.0900
Sale          156                      57.4000
Sale          3,322                    58.3500
Sale          11                       57.7175
Sale          100                      58.2000
Sale          2,865                    57.6579
Sale          100                      57.7240
Sale          182                      58.1668
Sale          125                      58.0250
Sale          50                       57.5600
Sale          106                      57.8000
Sale          300                      57.7600
Sale          12,641                   57.7506
Sale          11                       58.3175
Sale          34                       57.8650
Sale          90                       57.7576
Sale          100                      57.8228
Sale          28                       57.8111
Sale          180                      57.2300
Sale          150                      58.2000
Sale          250                      58.0250
Sale          90                       57.8236
Sale          80                       57.2224
Sale          70                       58.0800
Sale          100                      57.7141
Sale          240                      58.0250
Sale          73                       58.2000
Sale          153                      57.8800
Sale          100                      57.8632
Sale          275                      58.2768
Sale          175                      58.2000
Sale          150                      58.2000
Sale          10                       57.9525
Sale          1,957                    Transfer
Sale          100                      58.0800
Sale          185                      57.8324
Sale          403                      57.9122
Sale          1,957                    Transfer
Sale          50                       75.3000 EUR
Sale          60                       57.7008
Sale          100                      57.6324
Sale          20                       57.8130
Sale          100                      57.4948
Sale          50                       58.5800
Sale          107                      58.0732
Sale          122                      58.0250
Sale          908                      57.7000
Sale          400                      58.0250
Sale          8,076                    57.6579
Sale          60                       58.2317
Sale          75                       57.7724

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         607           57.4701
CFD            Short         4168          57.842
CFD            Short         485           57.881
CFD            Short         13500         57.9504
CFD            Short         24442         57.9899
CFD            Short         78379         58.0139
CFD            Long          908           57.7
CFD            Long          12641         57.7505
CFD            Long          403           57.9122
CFD            Long          403           58.0899
CFD            Long          42            58.2911

(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                         28 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