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               29 November 2007

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      46,638,528      4.68%     2,776,057      0.28%
securities
(2) Derivatives    5,539,491      0.56%     2,564,137      0.26%
(other than
options)
(3) Options and        3,631      0.00%     1,303,231      0.13%
agreements to
purchase/sell
Total             52,181,650      5.23%     6,643,425      0.67%


(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      20,144               54.5310
Purchase      319                  54.3500
Purchase      3,150                54.5146
Purchase      700                  54.4614
Purchase      81,000               56.4000
Purchase      6,644                54.2937
Purchase      5,552                54.3834
Purchase      5,552                54.3834
Purchase      6,411                51.9423
Purchase      21,024               56.3700
Purchase      16,898               54.4667
Purchase      205                  54.3500
Purchase      48,889               54.4775
Purchase      310                  54.3500
Purchase      364                  54.5146
Purchase      427                  54.6723
Purchase      1,905                51.0554
Purchase      4,802                56.9080
Purchase      427                  54.6723
Purchase      1,905                51.0554
Purchase      966                  56.3700
Purchase      891                  54.5146
Purchase      816                  56.1574
Purchase      1,033                54.5146
Purchase      4,530                54.6875
Purchase      225                  54.2668
Sale          175                  56.5024
Sale          1,482                53.6200
Sale          1,033                54.5146
Sale          100                  54.6783
Sale          1,000                54.0901
Sale          90                   54.7320
Sale          299                  54.3700
Sale          33,549               54.5750
Sale          5,438                54.5146
Sale          364                  54.5146
Sale          1,905                51.0554
Sale          427                  54.6723
Sale          5,552                54.3834
Sale          114                  53.9850
Sale          5,950                56.2229
Sale          98                   51.0550
Sale          816                  56.1574
Sale          41                   53.8600
Sale          77                   54.5075
Sale          97                   54.4600
Sale          6,814                55.7097
Sale          4,704                56.3700
Sale          1,200                54.4895
Sale          38,018               55.4951
Sale          4,618                54.3391
Sale          6,411                51.9423
Sale          154                  54.8100
Sale          200                  53.6195
Sale          535                  54.2645
Sale          200                  54.6783
Sale          40,348               55.2621
Sale          75                   56.8948
Sale          4,530                54.6875
Sale          3,342                54.4513
Sale          4,530                54.6875
Sale          300                  51.6900
Sale          3,150                54.5146
Sale          891                  54.5146
Sale          16,845               56.3700
Sale          45                   54.4125
Sale          816                  56.1574
Sale          6,411                51.9423
Sale          200                  55.1308
Sale          20                   53.8600
Sale          1,671                56.3700
Sale          20                   53.8600
Sale          75                   54.7125


(b)  Derivatives transactions (other than options)
Product name, Long/Short           Number of      Price per
(e.g. CFD)    (Note 6)             Securities     unit (GBP)
CFD           Short                1905           51.0554
CFD           Short                225            54.2668
CFD           Short                6644           54.2937
CFD           Short                5552           54.3834
CFD           Short                700            54.4614
CFD           Short                48889          54.4775
CFD           Short                20144          54.531
CFD           Short                427            54.6722
CFD           Short                4802           56.908
CFD           Long                 6411           51.9423
CFD           Long                 1000           54.0901
CFD           Long                 4618           54.3391
CFD           Long                 3342           54.4512
CFD           Long                 4530           54.6875
CFD           Long                 40348          55.2621
CFD           Long                 38018          55.495
CFD           Long                 6814           55.7097
CFD           Long                 816            56.1574
CFD           Long                 5950           56.2229


(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)
CALL            PURCHASE          300000             56        AMER          15/02/2008  2.8
PUT             SALE              300000             52        AMER          15/02/2008  5.8


(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                         30 November 2007
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   100                    5,600.0000       EURO 18/01/2008
Option            Purchased   -300,000               52.0000         AMER 15/02/2008
Option            Purchased   -300,000               56.0000         AMER 15/02/2008
Option            Purchased   -100,000               30.0000         AMER 20/06/2008
Option            Purchased   -1,000                 3,500.0000      EURO 21/12/2007
Option            Purchased   -500                   4,400.0000      EURO 21/12/2007
Option            Purchased   -350                   5,200.0000      EURO 21/12/2007
Option            Purchased   -306                   4,200.0000      EURO 21/12/2007
Option            Purchased   -300                   3,800.0000      EURO 20/06/2008
Option            Purchased   -275                   4,800.0000      EURO 21/12/2007
Option            Purchased   -250                   2,500.0000      EURO 20/06/2008
Option            Purchased   -600,000               42.0000         AMER 21/12/2007
Option            Purchased   50                     5,400.0000      EURO 20/03/2008
Option            Purchased   500                    5,200.0000      EURO 21/12/2007
Option            Purchased   125                    4,400.0000      EURO 20/06/2008
Option            Purchased   125                    4,400.0000      EURO 20/06/2008
Option            Purchased   250                    3,000.0000      EURO 20/06/2008
Option            Purchased   250                    3,300.0000      EURO 21/12/2007
Option            Purchased   250                    3,800.0000      EURO 20/06/2008
Option            Purchased   250                    4,500.0000      EURO 21/12/2007
Option            Purchased   275                    5,000.0000      EURO 21/12/2007
Option            Purchased   306                    4,800.0000      EURO 21/12/2007
Option            Purchased   350                    4,600.0000      EURO 19/12/2008
Option            Purchased   350                    4,600.0000      EURO 19/12/2008
Option            Purchased   450                    3,500.0000      EURO 21/12/2007
Option            Purchased   -250                   5,200.0000      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