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               04 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      47,095,973      4.72%    1,539,777       0.15%
securities
(2) Derivatives    2,647,055      0.27%       86,952       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             49,790,828      4.99%     2,327,539      0.23%


(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          11,366                    54.8811
Purchase          12,789                    54.9748
Purchase          450                       55.5672
Purchase          3,704                     55.5051
Purchase          5,580                     54.9748
Purchase          4,959                     54.8811
Purchase          1,100                     55.4209
Purchase          7,765                     55.2700
Purchase          23,574                    55.3635
Purchase          91                        54.8700
Purchase          8,318                     55.1225
Purchase          29,148                    55.5650
Purchase          1,575                     55.4900
Purchase          3,799                     54.9748
Purchase          1,100                     55.4209
Purchase          3,377                     54.8811
Purchase          8,341                     55.3105
Purchase          4,500                     55.3571
Sale              145                       55.1500
Sale              48,132                    55.3617
Sale              135                       54.8575
Sale              125                       55.0525
Sale              50                        55.2300
Sale              8,341                     55.3105
Sale              165                       55.6824
Sale              300                       55.4750
Sale              180                       55.6636
Sale              3,500                     55.6500
Sale              55                        55.2100
Sale              38                        55.3150
Sale              1,800                     55.4400
Sale              300                       55.3100
Sale              100                       55.1200
Sale              46                        55.1700
Sale              343                       55.5550
Sale              37                        55.1112
Sale              150                       55.7500
Sale              161                       55.2300
Sale              200                       55.8175
Sale              1,575                     55.4900
Sale              20                        55.7524
Sale              416                       56.0250
Sale              42,268                    55.6100
Sale              37                        55.7525
Sale              17                        55.4900
Sale              18                        55.1016
Sale              42,268                    55.1800
Sale              35                        55.5500
Sale              135                       55.7700
Sale              60                        55.4150
Sale              100                       55.7250
Sale              615                       55.0825
Sale              23                        56.0500
Sale              57,561                    60.0000
Sale              23,007                    60.0000
Sale              175                       55.7224
Sale              150                       55.3025
Sale              1,786                     55.2700
Sale              3,100                     55.2000
Sale              20                        55.1915
Sale              185                       55.1125
Sale              260                       55.4900
Sale              20                        73.9600 EUR
Sale              1,100                     55.4209
Sale              892                       55.5790
Sale              30,524                    55.2246
Sale              2,037                     55.2700
Sale              187,611                   60.0000
Sale              35                        55.7526
Sale              80                        55.3775
Sale              84,826                    60.0000
Sale              80                        55.6550
Sale              4,396                     55.5059
Sale              34,428                    55.5410
Sale              4,930                     60.0000
Sale              8,341                     55.3105
Sale              41                        55.2000
Sale              300                       55.3100
Sale              200                       55.6600
Sale              42,268                    55.1800

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         8318          55.1224
CFD            Short         4500          55.357
CFD            Short         23574         55.3635
CFD            Short         1100          55.4209
CFD            Short         3704          55.505
CFD            Long          20            55.1915
CFD            Long          30524         55.2245
CFD            Long          8341          55.3104
CFD            Long          48132         55.3617
CFD            Long          4396          55.5059
CFD            Long          34428         55.5409

(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                         05 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   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
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   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   150                    4,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
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   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008

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