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               26 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      46,496,663      4.66%     1,347,393      0.14%
securities
(2) Derivatives    2,506,038      0.25%        56,343      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,049,351      4.92%      1,504,546     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      9                        Transfer
Purchase      76                       Transfer
Purchase      4,420                    57.5742
Purchase      16,535                   57.5600
Purchase      2,088                    57.7009
Purchase      495                      58.0526
Purchase      395                      Transfer
Purchase      2,349                    57.7800
Purchase      93,481                   57.5961
Purchase      5,000                    57.5591
Purchase      18,930                   57.5021
Purchase      7,500                    56.8552
Purchase      805                      58.1500
Purchase      407                      57.5064
Purchase      661                      57.8724
Purchase      64,000                   57.4619
Purchase      869                      58.1500
Sale          50                       57.6026
Sale          64,000                   57.4619
Sale          16,535                   57.5600
Sale          15,000                   54.9475
Sale          70                       58.0126
Sale          125                      57.7712
Sale          15                       58.1150
Sale          505                      57.7975
Sale          64,000                   57.4619
Sale          1,129                    57.4000
Sale          100                      57.1600
Sale          36                       57.5350
Sale          65                       57.7251
Sale          100                      58.0125
Sale          300                      57.7375
Sale          200                      57.4932
Sale          65                       57.3848
Sale          160                      57.6700
Sale          110                      58.0175
Sale          4,225                    57.6700
Sale          250                      57.9100
Sale          27                       57.7225
Sale          70                       57.4924
Sale          230                      58.0125
Sale          258                      57.6248
Sale          90                       57.7050
Sale          165                      57.8300
Sale          40                       56.7400
Sale          70                       57.7700
Sale          430                      57.5600
Sale          90                       57.7376
Sale          1,041                    57.2319
Sale          60                       Transfer
Sale          22                       57.7100
Sale          75                       57.9275
Sale          100                      57.6625
Sale          87                       57.0975
Sale          400                      57.2214
Sale          42                       57.9100
Sale          78                       Transfer
Sale          430                      57.6057
Sale          500                      57.6025
Sale          36                       57.5725
Sale          110                      58.0125
Sale          280                      57.6775
Sale          75                       57.1040
Sale          2,185                    57.6142
Sale          157                      58.0125
Sale          80                       57.5950
Sale          80                       58.0125
Sale          50                       58.0300
Sale          175                      57.1600
Sale          25                       58.0500
Sale          61                       57.1600
Sale          150                      57.1600
Sale          8                        58.1000

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         7500          56.8551
CFD            Short         39            56.9553
CFD            Short         18930         57.502
CFD            Short         407           57.5064
CFD            Short         5000          57.559
CFD            Short         4420          57.5742
CFD            Short         93481         57.596
CFD            Short         661           57.8724
CFD            Long          15000         54.9475
CFD            Long          400           57.2214
CFD            Long          64000         57.4619
CFD            Long          430           57.6056
CFD            Long          2185          57.6142
CFD            Long          258           57.6248

(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                         27 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