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               28 January 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      48,880,712      4.90%      988,607       0.10%
securities
(2) Derivatives    2,375,202      0.24%      143,494       0.01%
(other than
options)
(3) Options and        2,800      0.00%      700,800       0.07%
agreements to
purchase/sell
Total             51,258,714      5.14%     1,832,901      0.18%


(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      11,516                   46.1800
Purchase      239                      45.0300
Purchase      3,237                    44.9733
Purchase      5,175                    45.3982
Purchase      239                      45.1100
Purchase      218                      44.9733
Purchase      43,739                   45.1812
Purchase      11,522                   46.0500
Purchase      573                      45.4900
Purchase      107,789                  45.1109
Purchase      534                      46.1800
Purchase      11,582                   45.2673
Purchase      850                      44.9733
Purchase      1,275                    45.4900
Purchase      7,390                    45.1098
Purchase      16                       44.8800
Purchase      4,968                    45.7704
Purchase      4,424                    45.4900
Purchase      213                      46.1800
Purchase      800                      45.1768
Purchase      2,844                    46.4400
Purchase      39,761                   45.2321
Purchase      271                      44.9733
Sale          1,000                    45.7050
Sale          573                      45.4900
Sale          4,735                    45.4326
Sale          126,804                  45.0500
Sale          4,213                    45.4193
Sale          663                      45.1259
Sale          300                      45.3575
Sale          5,320                    46.2258
Sale          43                       44.9475
Sale          34                       45.5800
Sale          3,713                    45.4900
Sale          239                      45.1100
Sale          15,925                   45.2936
Sale          140                      44.7124
Sale          14                       44.6175
Sale          17,200                   45.2802
Sale          529                      44.7444
Sale          19                       44.6000
Sale          3,633                    45.0135
Sale          4,438                    45.4900

NB: The below transactions which were previously disclosed have been cancelled
Deal Date     Purchase/Sale    Number of Securities   Price per unit (GBP)
25/01/2008    Sale             59                     47.4022
25/01/2008    Sale             12,204                 46.8040

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         7390           45.1097
CFD            Short         107789         45.1108
CFD            Short         800            45.1767
CFD            Short         43739          45.1811
CFD            Short         11582          45.2673
CFD            Short         5175           45.3982
CFD            Long          1986           0.4469
CFD            Long          1600           44.3592
CFD            Long          529            44.7444
CFD            Long          3633           45.0135
CFD            Long          663            45.1259
CFD            Long          2787           45.232
CFD            Long          17200          45.2802
CFD            Long          13138          45.3066
CFD            Long          4213           45.4193

NB: The below transactions which were previously disclosed have been cancelled
Deal Date     Long/Short   Number of Securities   Price per unit (GBP)
25/01/2008    Long         59                     47.4022
25/01/2008    Long         12,204                 46.804

(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                         29 January 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   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   50                     5,400.0000       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   150                    4,400.0000       EURO           20/03/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   -300                   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   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008

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