Rule 8.3 - XSTRATA 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              XSTRATA PLC
Class of relevant security    ORD USD0.50
to which the dealings being
disclosed relate (Note 2)
Date of dealing               19 December 2007

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      26,591,819      2.74%      837,431       0.09%
securities
(2) Derivatives      180,455      0.02%      166,874       0.02%
(other than
options)
(3) Options and        2,850      0.00%        2,000       0.00%
agreements to
purchase/sell
Total             26,775,124      2.76%     1,006,305      0.10%


(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      57,000               34.3713
Purchase      44,012               34.8860
Purchase      1,056                34.8800
Purchase      89,001               34.8516
Purchase      1,200                34.8800
Purchase      2,519                34.8800
Purchase      200                  34.9008
Purchase      89,001               34.8516
Purchase      8,100                34.4269
Purchase      500                  34.5500
Purchase      41,678               34.7199
Purchase      104,323              34.6418
Purchase      1,200                34.9608
Purchase      200                  34.9008
Purchase      1,200                34.9608
Purchase      1,655                34.8800
Purchase      10,489               34.6796
Purchase      48,266               34.4065
Purchase      5,203                34.4537
Purchase      381                  34.7700
Purchase      239                  34.7700
Purchase      57,000               34.3713
Purchase      4,399                34.5370
Purchase      19,494               34.8800
Purchase      79,399               34.8957
Sale          1,056                34.8734
Sale          57,000               34.3713
Sale          5,203                34.4472
Sale          10,489               34.6730
Sale          8,100                34.4269
Sale          200                  34.9008
Sale          8,100                34.4269
Sale          4,399                34.5338
Sale          41,678               34.7199
Sale          500                  34.5438
Sale          48,266               34.4065
Sale          1,200                34.8800
Sale          1,200                34.9608
Sale          44,012               34.8829
Sale          284                  34.8800
Sale          89,001               34.8516
Sale          5,527                34.8800
Sale          79,399               34.8957
Sale          104,323              34.6418
Sale          104,323              34.6418

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         5203          34.4537
CFD            Short         4399          34.5369
CFD            Short         79399         34.8956
CFD            Short         200           34.9008
CFD            Short         1200          34.9608
CFD            Long          48266         34.4065
CFD            Long          8100          34.4269
CFD            Long          500           34.5437
CFD            Long          10489         34.673
CFD            Long          1056          34.8733
CFD            Long          44012         34.8828

(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                         20 December 2007
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   550                    3,600.0000       EURO           21/12/2007
Option            Purchased   500                    3,400.0000       EURO           20/03/2008
Option            Purchased   500                    3,200.0000       EURO           21/12/2007
Option            Purchased   400                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           21/12/2007
Option            Purchased   250                    3,200.0000       EURO           20/03/2008
Option            Purchased   250                    3,200.0000       EURO           20/03/2008
Option            Purchased   150                    4,000.0000       EURO           20/06/2008
Option            Purchased   -250                   3,300.0000       EURO           21/12/2007
Option            Purchased   -250                   3,100.0000       EURO           21/12/2007
Option            Purchased   -500                   3,400.0000       EURO           21/12/2007
Option            Purchased   -500                   3,600.0000       EURO           20/06/2008
Option            Purchased   -500                   3,200.0000       EURO           21/12/2007



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