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               04 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      48,729,767     4.88%        734,105     0.07%
securities
(2) Derivatives      896,128     0.09%      1,896,874     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             49,727,095     4.98%      2,907,938     0.29%


(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         1,000                 28.2600
Purchase         14,094                29.7382
Purchase         2,840                 31.2129
Purchase         29,807                28.8685
Purchase         50                    37.4200 EUR
Purchase         2,000                 30.0945
Purchase         200,000               28.1126
Purchase         41,492                28.8000
Purchase         2,800                 28.1712
Purchase         8,000                 31.3500
Purchase         1,200                 29.6600
Purchase         1,000                 28.2600
Purchase         8,966                 31.3500
Purchase         6,710                 27.9830
Purchase         941                   31.0809
Purchase         425                   31.3500
Purchase         7,195                 30.1230
Purchase         639                   28.8300
Purchase         137,849               28.7886
Purchase         609                   31.3500
Purchase         15,747                30.5477
Sale             463                   29.6600
Sale             1,090                 29.5874
Sale             1,025                 Transfer
Sale             337                   29.6700
Sale             100                   29.6600
Sale             5,400                 29.7259
Sale             1,509                 28.5100
Sale             62,592                30.6282
Sale             250                   28.1064
Sale             28                    29.0410
Sale             1,200                 29.6600
Sale             65                    27.9340
Sale             6,000                 31.3500
Sale             159                   28.3540
Sale             203                   28.3540
Sale             13,561                31.3500
Sale             100                   38.7200 EUR
Sale             85                    28.0031
Sale             110                   28.8520
Sale             150                   29.9820
Sale             300                   29.6600
Sale             100                   28.4670
Sale             44,718                28.6710
Sale             7,091                 30.1648
Sale             870                   29.3571
Sale             13,543                29.5436
Sale             1,579                 28.9800
Sale             8,500                 30.2980
Sale             30                    29.1720
Sale             85,536                30.0229
Sale             7,300                 30.2980
Sale             1,618                 31.3500

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          4561          27.9298
CFD            Long          250           28.1064
CFD            Long          44718         28.671
CFD            Long          13543         29.5435
CFD            Long          1090          29.5874
CFD            Long          5400          29.7258
CFD            Long          85536         30.0228
CFD            Long          7091          30.1648
CFD            Long          62592         30.6282
CFD            Long          4117          31.044
CFD            Short         200000        28.1126
CFD            Short         2800          28.1712
CFD            Short         137849        28.7885
CFD            Short         29807         28.8685
CFD            Short         14094         29.7381
CFD            Short         2000          30.0945
CFD            Short         7195          30.123
CFD            Short         15747         30.5476
CFD            Short         346           31.1
CFD            Short         2840          31.2128

(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                         05 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   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
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

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