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               21 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      49,579,773     4.97%        854,777     0.09%
securities
(2) Derivatives      462,153     0.05%      1,706,350     0.17%
(other than
options)
(3) Options and      101,200     0.01%        126,828     0.01%
agreements to
purchase/sell
Total             50,143,126     5.02%      2,687,955     0.27%

(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         57                    20.7700
Purchase         2,350                 21.0728
Purchase         50,200                21.5781
Purchase         6,608                 20.7500
Purchase         250                   21.3400
Purchase         100                   20.7534
Purchase         27,577                21.1121
Purchase         2,000                 44.0000
Purchase         29,470                20.7500
Purchase         5,759                 21.1778
Purchase         130                   20.9200
Purchase         250                   20.6400
Purchase         1,671                 21.2723
Purchase         58,139                20.7523
Purchase         2,640                 21.3828
Purchase         59,685                20.7673
Purchase         7,600                 20.8076
Purchase         46                    21.2200
Purchase         7,329                 21.0498
Purchase         20,969                21.0827
Purchase         5,189                 20.8397
Purchase         523                   21.2800
Purchase         11,554                21.2742
Purchase         240,000               19.2901
Purchase         4,400                 20.9282
Purchase         1,278                 20.7500
Purchase         712                   20.7500
Purchase         4,210                 20.7500
Purchase         50,520                20.7500
Purchase         300                   21.1367
Sale             151                   21.3410
Sale             27,348                21.4905
Sale             20,602                21.0556
Sale             911                   20.7563
Sale             300                   21.1367
Sale             4,730                 21.0607
Sale             85                    21.9430
Sale             520                   21.6864
Sale             67,656                21.0155
Sale             2,400                 21.5386
Sale             59                    21.5420
Sale             50,200                21.5781
Sale             8,901                 21.4197
Sale             400                   21.0772
Sale             2,350                 21.0802
Sale             124                   21.0100
Sale             6,485                 21.4208
Sale             250                   21.0300
Sale             2,789                 21.4208
Sale             1,762                 21.4208
Sale             2,443                 21.4208
Sale             304                   21.4208
Sale             700                   21.1748
Sale             329                   21.4208
Sale             594                   21.2853
Sale             1,464                 21.2853
Sale             574                   21.4208
Sale             1,847                 21.4208
Sale             863                   21.4208
Sale             495                   20.7500
Sale             990                   20.7500
Sale             7,842                 21.4208
Sale             904                   21.4208
Sale             2,855                 21.4208
Sale             400                   21.8000
Sale             19,701                20.9828
Sale             14,560                20.7500
Sale             847                   20.7500
Sale             6,608                 20.7500
Sale             2,065                 21.2853
Sale             50                    21.4940
Sale             559                   21.1748
Sale             495                   21.2853
Sale             55,335                21.5696
Sale             2,419                 21.4208
Sale             191                   21.4208
Sale             3,620                 21.6239
Sale             1,777                 21.2853
Sale             75                    22.1611
Sale             1,633                 21.2853
Sale             1,294                 21.4208
Sale             6,221                 21.2853

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            1176            20.75
CFD            Long            2573            20.8697
CFD            Long            19701           20.9827
CFD            Long            67656           21.0155
CFD            Long            20602           21.0555
CFD            Long            4730            21.0606
CFD            Long            400             21.0772
CFD            Long            300             21.1366
CFD            Long            8901            21.4196
CFD            Long            27348           21.4904
CFD            Long            1360            21.5299
CFD            Long            2400            21.5386
CFD            Long            55335           21.5695
CFD            Long            50200           21.5781
CFD            Long            520             21.6863
CFD            Short           240000          19.29
CFD            Short           58139           20.7522
CFD            Short           100             20.7534
CFD            Short           59685           20.7672
CFD            Short           7600            20.8076
CFD            Short           5189            20.8396
CFD            Short           6955            20.9014
CFD            Short           4400            20.9281
CFD            Short           7329            21.0497
CFD            Short           20969           21.0827
CFD            Short           27577           21.1121
CFD            Short           300             21.1366
CFD            Short           39842           21.2126
CFD            Short           1671            21.2722
CFD            Short           11554           21.2741
CFD            Short           2640            21.3828
CFD            Short           50200           21.5781

(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                         24 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   -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   -42                    5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -221                   4,400.0000       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   -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