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               18 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      48,678,074     4.88%      1,180,927     0.12%
securities
(2) Derivatives      792,170     0.08%      1,847,340     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,571,444     4.97%      3,305,226     0.33%

(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         1,706                 24.6800
Purchase         12,100                23.8776
Purchase         4,000                 23.9536
Purchase         1,900                 23.5640
Purchase         100,000               23.7327
Purchase         13,216                24.1133
Purchase         62,612                24.0054
Purchase         200                   23.6300
Purchase         407                   23.9100
Purchase         16,793                23.9194
Purchase         20,804                23.9414
Purchase         3,250                 23.7598
Purchase         8,869                 24.0183
Purchase         26,726                24.4936
Purchase         33,468                24.6800
Purchase         300                   23.3000
Purchase         12,345                24.6800
Purchase         12,345                24.6800
Purchase         900                   23.5300
Purchase         422                   24.6800
Purchase         13,571                23.9559
Purchase         1,050                 23.4900
Purchase         84,342                24.6800
Purchase         52,370                23.6480
Purchase         200                   23.3000
Purchase         1,415                 24.6800
Purchase         8,137                 24.6800
Sale             1,800                 23.1000
Sale             3,148                 23.4750
Sale             9,678                 23.8810
Sale             1,762                 Transfer
Sale             39,286                24.3955
Sale             26,300                24.6374
Sale             16,380                24.0652
Sale             2,150                 24.6594
Sale             2,400                 23.3123
Sale             17,202                23.9720
Sale             33                    Transfer
Sale             12,899                23.2520
Sale             3,250                 23.7632
Sale             200                   23.6300
Sale             1,000                 23.2402
Sale             7                     Transfer
Sale             3,500                 24.6316
Sale             1,800                 23.2045
Sale             250                   23.8720
Sale             270                   23.8200
Sale             240                   24.3500
Sale             3,613                 24.6800
Sale             115,448               23.7126
Sale             2,500                 24.5360

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            1800            23.1
CFD            Long            1800            23.2045
CFD            Long            1000            23.2402
CFD            Long            12899           23.252
CFD            Long            200             23.63
CFD            Long            9678            23.881
CFD            Long            17202           23.9719
CFD            Long            16380           24.0651
CFD            Long            39286           24.3954
CFD            Long            2500            24.5359
CFD            Long            3500            24.6316
CFD            Long            26300           24.6373
CFD            Long            2150            24.6594
CFD            Long            1418            24.68
CFD            Short           900             3.53
CFD            Short           1900            23.564
CFD            Short           200             23.63
CFD            Short           52370           23.6479
CFD            Short           100000          23.7326
CFD            Short           10605           23.8735
CFD            Short           12100           23.8776
CFD            Short           3489            23.8781
CFD            Short           16793           23.9193
CFD            Short           20804           23.9414
CFD            Short           4000            23.9535
CFD            Short           62612           24.0053
CFD            Short           8869            24.0182
CFD            Short           13216           24.1133

(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                         19 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