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               20 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      49,316,334     4.94%      1,142,490     0.11%
securities
(2) Derivatives      746,068     0.07%      1,709,317     0.17%
(other than
options)
(3) Options and      101,200     0.01%        276,830     0.03%
agreements to
purchase/sell
Total             50,163,602     5.03%      3,128,637     0.31%

(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         400                   21.3400
Purchase         1,500                 21.1500
Purchase         135                   21.2500
Purchase         145                   20.2200
Purchase         500                   21.0700
Purchase         750                   21.5335
Purchase         6,700                 20.6870
Purchase         62,819                20.4727
Purchase         48,108                20.2200
Purchase         941                   21.0364
Purchase         5,633                 20.6776
Purchase         603                   Transfer
Purchase         300                   20.9806
Purchase         1,354                 20.3848
Purchase         2,100                 20.8452
Purchase         1,560                 20.2230
Purchase         3,446                 20.9400
Purchase         100                   21.1400
Purchase         30,458                20.5774
Purchase         8,079                 21.0834
Purchase         5,313                 20.9337
Purchase         569                   19.9700
Purchase         8,294                 20.2200
Purchase         10,291                20.2200
Purchase         15,558                20.9564
Purchase         27,442                20.5148
Purchase         4,905                 21.1502
Purchase         2,346                 20.9400
Purchase         100                   25.7800 EUR
Sale             45                    Transfer
Sale             8,942                 21.0886
Sale             5,926                 21.2245
Sale             100                   21.1400
Sale             41                    21.2540
Sale             14,383                20.8818
Sale             1,671                 20.3170
Sale             8,945                 20.4438
Sale             26,179                20.7558
Sale             621                   20.1167
Sale             13,178                20.8875
Sale             98,328                21.2564
Sale             603                   Transfer
Sale             200                   20.3700
Sale             14,810                20.3488
Sale             23,628                20.8452
Sale             32,243                22.5700
Sale             879                   21.0730
Sale             243                   21.1100
Sale             383                   21.1100
Sale             29                    20.6659
Sale             250                   21.1710
Sale             48,108                20.2200
Sale             2,100                 20.8569
Sale             300                   20.3200
Sale             29                    21.7120
Sale             90                    19.7300
Sale             100                   20.3800
Sale             250                   19.9000
Sale             60                    20.0400
Sale             46,514                20.4762
Sale             27                    23.6830
Sale             190                   20.8795
Sale             2,406                 21.1779
Sale             433                   20.9716
Sale             100                   20.6200

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            1671            20.3169
CFD            Long            14810           20.3487
CFD            Long            46514           20.4762
CFD            Long            2640            20.4959
CFD            Long            26179           20.7557
CFD            Long            23628           20.8451
CFD            Long            190             20.8794
CFD            Long            14383           20.8817
CFD            Long            13178           20.8874
CFD            Long            433             20.9715
CFD            Long            8942            21.0885
CFD            Long            100             21.14
CFD            Long            4516            21.1608
CFD            Long            2406            21.1779
CFD            Long            5926            21.2244
CFD            Long            98328           21.2564
CFD            Short           1560            20.223
CFD            Short           1354            20.3848
CFD            Short           62819           20.4727
CFD            Short           27442           20.5148
CFD            Short           30458           20.5773
CFD            Short           5633            20.6776
CFD            Short           6700            20.687
CFD            Short           5313            20.9337
CFD            Short           300             20.9806
CFD            Short           941             21.0363
CFD            Short           8062            21.0667
CFD            Short           8079            21.0834
CFD            Short           100             21.14
CFD            Short           3341            21.1456
CFD            Short           7686            21.1493
CFD            Short           4905            21.1502
CFD            Short           750             21.5335

(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                         21 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   -42                    5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -223                   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