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               05 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      48,579,817     4.85%        868,573     0.09%
securities
(2) Derivatives    1,038,435     0.10%      1,882,140     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,719,452     4.96%      3,027,672     0.30%

(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         1,380                 30.8300
Purchase         784                   29.8780
Purchase         400                   30.0400
Purchase         3,630                 29.9147
Purchase         4,483                 29.4800
Purchase         3,345                 30.1736
Purchase         850                   29.4800
Purchase         1,141                 31.3500
Purchase         1,142                 29.4800
Purchase         478                   29.4800
Purchase         4,400                 29.7290
Purchase         2,149                 30.1736
Purchase         4,144                 30.2620
Purchase         3,272                 29.9668
Purchase         40,000                29.1279
Purchase         56,834                29.6584
Purchase         688                   30.3995
Purchase         10,813                30.0161
Purchase         3,743                 30.1913
Purchase         12,565                29.8730
Purchase         2,854                 29.0000
Purchase         279                   29.8909
Purchase         112                   29.8909
Purchase         2,266                 29.4800
Purchase         10,712                29.4800
Purchase         901                   31.3500
Sale             2,615                 29.9933
Sale             2,483                 29.9933
Sale             4,285                 29.9933
Sale             862                   29.9933
Sale             40,000                29.1279
Sale             66,024                30.1205
Sale             3,237                 30.2462
Sale             15,475                30.1964
Sale             40,000                29.1279
Sale             274                   29.9933
Sale             4,907                 30.2284
Sale             789                   30.1644
Sale             15,521                29.7919
Sale             54                    Transfer
Sale             182                   29.4800
Sale             74,335                29.7730
Sale             3,568                 29.9933
Sale             1,010                 30.0443
Sale             16                    28.8950
Sale             8,298                 29.4800
Sale             2,091                 29.7663
Sale             6,163                 29.9933
Sale             160                   29.7130
Sale             300                   29.6900
Sale             2,189                 29.9933
Sale             1,157                 29.9933
Sale             1,290                 29.9933
Sale             200                   36.6800 EUR
Sale             2,020                 29.9933
Sale             9,685                 30.0041
Sale             1,076                 29.5361
Sale             437                   29.9933
Sale             3,531                 29.5361
Sale             1,801                 29.5361
Sale             289                   29.8585
Sale             2,044                 29.9933
Sale             437                   29.9933
Sale             4,310                 29.5361
Sale             200                   30.4610

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          40000         29.1279
CFD            Long          3242          29.48
CFD            Long          74335         29.773
CFD            Long          15521         29.7919
CFD            Long          7839          29.8869
CFD            Long          6585          29.9984
CFD            Long          4292          29.9993
CFD            Long          9685          30.004
CFD            Long          1010          30.0442
CFD            Long          66024         30.1205
CFD            Long          789           30.1643
CFD            Long          15475         30.1964
CFD            Long          4907          30.2284
CFD            Long          3237          30.2461
CFD            Long          200           30.461
CFD            Short         56834         29.6584
CFD            Short         4400          29.729
CFD            Short         1533          29.83
CFD            Short         12565         29.873
CFD            Short         10813         30.016
CFD            Short         3743          30.1912
CFD            Short         4144          30.262
CFD            Short         688           30.3995
CFD            Short         1380          30.83

(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                         06 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