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               15 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      50,151,554     5.03%       942,651       0.09%
securities
(2) Derivatives    2,344,696     0.24%       117,622       0.01%
(other than
options)
(3) Options and      202,500     0.02%       701,200       0.07%
agreements to
purchase/sell
Total              52,698,750    5.28%      1,761,473      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      2,991                50.8652
Purchase      1,133                49.9600
Purchase      15,000               52.4300
Purchase      21,219               50.5467
Purchase      27,809               52.4246
Purchase      24,817               50.7644
Purchase      5,590                51.8467
Purchase      349                  50.8900
Purchase      7,906                49.9600
Purchase      3,684                49.9600
Purchase      49                   50.3200
Purchase      3,300                50.6329
Purchase      2,400                50.8409
Purchase      2,645                51.4730
Purchase      3,288                50.2055
Purchase      297                  52.4300
Purchase      3,335                50.3451
Purchase      777                  Transfer
Purchase      27,150               52.2255
Purchase      10,784               50.4928
Purchase      2,300                51.8467
Purchase      6,415                51.8467
Purchase      120                  51.7900
Purchase      4,110                50.2663
Purchase      15,000               52.4300
Purchase      106                  49.9600
Purchase      6,910                51.1307
Purchase      42                   Transfer
Purchase      349                  50.8900
Purchase      2,400                50.8409
Purchase      24,817               50.7644
Purchase      12,150               51.9730
Purchase      8,814                51.8467
Purchase      349                  50.8964
Purchase      4,701                50.8791
Purchase      3,800                50.8021
Purchase      1,100                50.2508
Purchase      6,105                50.5702
Purchase      549                  49.9600
Sale          6,792                49.9600
Sale          24                   51.2025
Sale          3,288                50.2055
Sale          871                  51.0000
Sale          28                   51.4175
Sale          85                   51.1332
Sale          60                   50.7332
Sale          75                   50.2916
Sale          349                  50.8900
Sale          125                  50.3025
Sale          42                   Transfer
Sale          27,809               52.4246
Sale          2,645                51.4730
Sale          10                   51.7540
Sale          5,654                49.9600
Sale          1,067                49.9600
Sale          1,100                50.2508
Sale          15,000               52.4300
Sale          66                   51.0850
Sale          4,701                50.8745
Sale          12,150               51.9730
Sale          3,896                49.9600
Sale          65                   51.2535
Sale          21,219               50.5467
Sale          2,991                50.8652
Sale          11,986               49.9600
Sale          4,110                50.2573
Sale          17                   51.3125
Sale          125                  50.8300
Sale          3,335                50.3451
Sale          80                   51.2536
Sale          42                   51.0700
Sale          10,784               50.4928
Sale          777                  Transfer
Sale          31                   51.2175
Sale          60                   51.3275
Sale          24,817               50.7644
Sale          3,687                49.9600
Sale          349                  50.8900
Sale          20,008               50.2482
Sale          45                   51.3350
Sale          50                   51.0932
Sale          21,219               50.5467
Sale          3,300                50.6283
Sale          70                   50.1931
Sale          15                   51.4175
Sale          6,105                50.5626
Sale          3,150                49.9600
Sale          3,800                50.7945
Sale          3,288                50.2055
Sale          1,100                50.2508
Sale          110                  51.2000
Sale          15,000               52.4300
Sale          40                   50.8225
Sale          40                   51.5100
Sale          20                   51.4175
Sale          40                   51.4250
Sale          2,645                51.4730
Sale          11                   51.1750
Sale          24                   51.3350
Sale          5,352                49.9600
Sale          22                   51.1575
Sale          6,910                51.1256
Sale          2,400                50.8409
Sale          30                   51.2200

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         4110          50.2662
CFD            Short         6105          50.5701
CFD            Short         3083          50.7106
CFD            Short         2400          50.8409
CFD            Short         2991          50.8652
CFD            Short         349           50.8963
CFD            Short         6910          51.1307
CFD            Short         1618          51.2001
CFD            Long          1100          50.2508
CFD            Long          3335          50.345
CFD            Long          1349          50.4696
CFD            Long          10784         50.4927
CFD            Long          1951          50.738
CFD            Long          3800          50.7944
CFD            Long          2645          51.473

(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                         16 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   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    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   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -400                   5,600.0000       EURO           18/01/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
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   200,000                60.0000          AMER           18/01/2008

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