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               11 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      48,057,536     4.79%      1,160,658     0.12%
securities
(2) Derivatives      771,901     0.08%      1,871,549     0.19%
(other than
options)
(3) Options and      101,200     0.01%        276,959     0.03%
agreements to
purchase/sell
Total             48,930,637     4.88%      3,309,166     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         70,285                27.2482
Purchase         14,582                26.0380
Purchase         34,776                25.9200
Purchase         942                   27.6000
Purchase         13,260                26.8420
Purchase         1,142                 25.9200
Purchase         851                   25.9200
Purchase         11,500                27.5367
Purchase         39,696                25.9200
Purchase         44,000                25.9200
Purchase         300                   26.7800
Purchase         175                   27.0200
Purchase         123,600               25.9200
Purchase         10,339                27.1162
Purchase         10,000                25.9239
Purchase         6,128                 27.2723
Purchase         436                   25.9200
Purchase         1,218                 25.9200
Purchase         72                    27.2800
Purchase         12,999                26.6361
Purchase         250                   26.5800
Sale             10,347                26.2458
Sale             300                   26.7800
Sale             74,630                26.5590
Sale             29,716                27.1487
Sale             13,636                26.6600
Sale             4,534                 26.1978
Sale             516,000               26.1020
Sale             3,978                 26.2419
Sale             180                   27.1000
Sale             177                   27.2465
Sale             54,297                25.9200
Sale             250                   27.2630
Sale             200                   27.3300
Sale             300                   27.3600
Sale             243                   25.9200
Sale             500                   27.9954
Sale             120                   27.2500
Sale             9,763                 26.5532
Sale             100                   26.2050
Sale             900                   27.3600
Sale             44,000                25.9200
Sale             1,255                 26.3393
Sale             4,666                 26.3246
Sale             5,260                 26.5028
Sale             11,000                26.1788
Sale             876                   25.9200

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          11000         26.1787
CFD            Long          4534          26.1977
CFD            Long          10347         26.2458
CFD            Long          4666          26.3245
CFD            Long          1255          26.3392
CFD            Long          5260          26.5028
CFD            Long          9763          26.5532
CFD            Long          74630         26.5589
CFD            Long          13636         26.66
CFD            Long          300           26.78
CFD            Long          29520         26.7966
CFD            Long          29716         27.1487
CFD            Long          500           27.9953
CFD            Short         10000         25.9238
CFD            Short         14582         26.038
CFD            Short         12999         26.6361
CFD            Short         300           26.78
CFD            Short         13260         26.8419
CFD            Short         10339         27.1161
CFD            Short         70285         27.2481
CFD            Short         6128          27.2722
CFD            Short         11500         27.5367

(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                         12 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