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               12 November 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      47,872,905     4.80%      1,356,211     0.14%
securities
(2) Derivatives      967,454     0.10%      1,863,808     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             48,941,559     4.90%      3,496,978     0.35%

(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         200                   26.3443
Purchase         2,768                 25.4733
Purchase         12,535                25.7125
Purchase         140                   25.2900
Purchase         48,000                25.6764
Purchase         12,778                25.0216
Purchase         600                   26.2990
Purchase         100,905               25.1958
Purchase         1,426                 25.2471
Purchase         4,439                 26.3350
Purchase         11,253                25.2416
Purchase         425                   25.4600
Purchase         102,875               25.4600
Purchase         4,115                 25.4600
Purchase         302                   26.6400
Purchase         713                   25.4600
Purchase         36,726                26.0940
Purchase         1,827                 25.4600
Purchase         1,332                 25.0238
Purchase         3,285                 26.1209
Purchase         359                   26.5619
Purchase         100                   25.3100
Sale             142,494               25.2142
Sale             5,625                 25.3722
Sale             41                    27.5740
Sale             168                   25.3410
Sale             18                    27.9110
Sale             57                    26.1420
Sale             100,905               25.1958
Sale             4,187                 24.8290
Sale             6,744                 25.2882
Sale             44,000                26.6613
Sale             3,230                 25.1899
Sale             18,265                25.4400
Sale             30                    27.5230
Sale             2,653                 25.8655
Sale             100                   25.3250
Sale             150                   25.6720
Sale             2,031                 25.2882
Sale             135                   26.2930
Sale             48,000                25.6764
Sale             2,599                 25.2882
Sale             26                    27.8670
Sale             48,000                25.6764
Sale             43                    Transfer
Sale             10,195                25.4439
Sale             46                    25.7220
Sale             1,332                 24.7811
Sale             34,700                25.3987
Sale             48                    27.7130
Sale             359                   26.5603
Sale             5,781                 24.9771
Sale             3,140                 25.4600
Sale             11,000                25.4600
Sale             29,835                25.4340
Sale             308                   25.1190
Sale             5,624                 Transfer

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          1332          24.7811
CFD            Long          5781          24.977
CFD            Long          308           25.1189
CFD            Long          3230          25.1898
CFD            Long          100905        25.1957
CFD            Long          142494        25.2141
CFD            Long          5625          25.3722
CFD            Long          34700         25.3987
CFD            Long          29835         25.4339
CFD            Long          18265         25.44
CFD            Long          10195         25.4439
CFD            Long          48000         25.6763
CFD            Long          1849          25.7337
CFD            Long          2653          25.8654
CFD            Short         12778         25.0215
CFD            Short         1332          25.0237
CFD            Short         100905        25.1957
CFD            Short         11253         25.2415
CFD            Short         2768          25.4732
CFD            Short         14212         25.5447
CFD            Short         12535         25.7125
CFD            Short         845           25.8259
CFD            Short         36726         26.094
CFD            Short         3285          26.1209
CFD            Short         600           26.299
CFD            Short         4439          26.335
CFD            Short         200           26.3443

(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                         13 November 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   100,000                56.0000          AMER           18/12/2009
Option            Purchased   -50,000                64.0000          AMER           21/11/2008
Option            Purchased   -100,000               64.0000          AMER           21/11/2008
Option            Purchased   -125,000               45.0000          AMER           20/03/2009
Option            Purchased   500                    5,000.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -94                    5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -270                   6,400.0000       EURO           19/12/2008
Option            Purchased   -300                   4,400.0000       EURO           19/12/2008
Option            Purchased   -300                   4,400.0000       EURO           19/12/2008
Option            Purchased   -350                   5,000.0000       EURO           19/12/2008
Option            Purchased   -500                   7,000.0000       EURO           19/12/2008

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