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               17 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      48,449,742     4.85%      1,358,955     0.14%
securities
(2) Derivatives      943,472     0.09%      1,826,897     0.18%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,494,414     4.96%       3,462,811    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         14,760                25.2908
Purchase         850                   24.5800
Purchase         34,012                25.0944
Purchase         18,426                25.0493
Purchase         4,115                 24.5800
Purchase         391                   24.9900
Purchase         139                   Transfer
Purchase         712                   24.5800
Purchase         4,677                 24.5800
Purchase         26,726                24.5800
Purchase         106                   Transfer
Purchase         1,800                 25.3148
Purchase         146,107               24.4786
Purchase         4,762                 24.6775
Purchase         1,400                 25.0001
Purchase         1,891                 24.9291
Purchase         75                    28.6800 EUR
Purchase         7,711                 24.7130
Purchase         450                   24.8562
Purchase         7,800                 25.2147
Purchase         800                   24.9700
Purchase         238                   25.0500
Purchase         1,469                 27.3500
Purchase         19,794                24.5800
Purchase         25,000                27.3996
Purchase         2,943                 24.9377
Purchase         250                   25.1000
Purchase         264                   25.8000
Purchase         715                   24.3059
Purchase         666                   24.3059
Purchase         13,212                24.3059
Purchase         4,483                 24.5800
Purchase         572                   24.3059
Purchase         395                   24.3059
Sale             170                   24.7610
Sale             66,661                24.5577
Sale             1,891                 24.9291
Sale             26,726                24.5800
Sale             1,400                 25.0046
Sale             3,271                 24.7146
Sale             436                   25.1217
Sale             635                   24.5800
Sale             51                    26.8610
Sale             50                    26.8620
Sale             7,055                 24.9842
Sale             11,995                24.6835
Sale             300                   25.0000
Sale             85                    24.1631
Sale             7,917                 25.2780
Sale             5,404                 24.8374
Sale             44,881                24.3598
Sale             17,103                24.6668
Sale             25,767                24.5637
Sale             505                   25.9958

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          44881         24.3597
CFD            Long          66661         24.5576
CFD            Long          25767         24.5636
CFD            Long          2262          24.58
CFD            Long          17103         24.6667
CFD            Long          11995         24.6835
CFD            Long          5404          24.8373
CFD            Long          1891          24.929
CFD            Long          7917          25.278
CFD            Long          505           25.9958
CFD            Short         146107        24.4785
CFD            Short         4762          24.6774
CFD            Short         14884         24.6856
CFD            Short         7711          24.7129
CFD            Short         450           24.8562
CFD            Short         1891          24.929
CFD            Short         18426         25.0492
CFD            Short         34012         25.0943
CFD            Short         7800          25.2147
CFD            Short         14760         25.2907
CFD            Short         1800          25.3148

(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                         18 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