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               14 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      50,155,390     5.03%       934,288       0.09%
securities
(2) Derivatives    2,336,333     0.23%       106,757       0.01%
(other than
options)
(3) Options and      202,500     0.02%       701,200       0.07%
agreements to
purchase/sell
Total              52,694,223    5.28%     1,742,245       0.17%


(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      20,938               50.9572
Purchase      2,632                51.4527
Purchase      493                  51.5597
Purchase      679                  51.6973
Purchase      3,271                50.9905
Purchase      11,670               51.0672
Purchase      100                  51.6360
Purchase      3,293                51.3764
Purchase      18,192               51.4581
Purchase      10,076               51.6093
Purchase      11,100               51.0444
Purchase      50,064               51.1547
Purchase      10,069               51.0634
Purchase      6,700                51.3370
Purchase      18,192               51.4581
Purchase      28,532               51.1249
Purchase      57                   51.0900
Purchase      1                    51.8000
Purchase      520                  50.9000
Purchase      570                  51.5111
Purchase      8,170                51.2818
Purchase      2,212                51.5198
Sale          2,488                51.6000
Sale          50,064               51.1547
Sale          2,212                51.5151
Sale          150                  51.0100
Sale          2,632                51.4476
Sale          679                  51.6973
Sale          35                   51.6137
Sale          200                  51.5850
Sale          3,293                51.3718
Sale          1,890                51.6000
Sale          67                   51.2024
Sale          28,532               51.1249
Sale          736                  51.6502
Sale          851                  51.0500
Sale          42,268               51.2400
Sale          50                   51.0436
Sale          1                    51.7900
Sale          18                   51.1748
Sale          6,700                51.3370
Sale          4,666                50.8611
Sale          31,701               50.9600
Sale          50,064               51.1547
Sale          1,368                51.0600
Sale          149                  51.0500
Sale          165                  51.0250
Sale          45                   51.0900
Sale          30                   51.3300
Sale          28                   50.8620
Sale          57                   51.0900
Sale          215                  51.2375
Sale          29                   51.3450
Sale          34                   51.1150
Sale          63                   51.3700
Sale          6,700                51.3370
Sale          18,192               51.4581
Sale          300                  51.2400
Sale          51                   51.4300
Sale          11,100               51.0444
Sale          10,069               51.0583
Sale          8,170                51.2741
Sale          570                  51.5111
Sale          20,938               50.9572
Sale          3,271                50.9905
Sale          725                  51.3525
Sale          10,076               51.6000

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         3271          50.9905
CFD            Short         1289          51.4509
CFD            Short         2632          51.4527
CFD            Short         10076         51.6092
CFD            Short         923           51.6158
CFD            Short         1             51.8
CFD            Long          10069         51.0582
CFD            Long          28532         51.1249
CFD            Long          1715          51.1724
CFD            Long          8170          51.274
CFD            Long          6700          51.337
CFD            Long          1578          51.5884

(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                         15 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   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
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   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   200,000                60.0000          AMER           18/01/2008
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   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   50                    5,400.0000        EURO           20/03/2008

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