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               18 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      26,538,364      2.73%      901,572       0.09%
securities
(2) Derivatives      187,596      0.02%      196,037       0.02%
(other than
options)
(3) Options and        2,850      0.00%        2,000       0.00%
agreements to
purchase/sell
Total             26,728,810      2.75%    1,099,609       0.11%


(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      74,822               34.8610
Purchase      5,047                34.8461
Purchase      47,329               34.9618
Purchase      9,817                34.4400
Purchase      2,000                35.1516
Purchase      600                  34.7717
Purchase      36,815               34.4400
Purchase      4,300                34.6335
Purchase      6,359                34.8529
Purchase      41,421               35.4203
Purchase      1,068                34.4465
Purchase      38,146               34.6315
Purchase      406                  34.6800
Purchase      29,145               34.4400
Purchase      6,912                34.7293
Purchase      57,000               34.8234
Purchase      15,019               34.5853
Purchase      5,781                35.0017
Purchase      4,300                34.6335
Sale          9,817                34.4400
Sale          4,586                34.5160
Sale          4,300                34.6335
Sale          38,962               34.4400
Sale          5,047                34.8430
Sale          6,912                34.7261
Sale          75                   34.1569
Sale          15,019               34.5853
Sale          41,421               35.4203
Sale          29,145               34.4400
Sale          819                  34.8981
Sale          7,116                34.5160
Sale          38,146               34.6315
Sale          6,359                34.8462
Sale          15,347               34.5160
Sale          600                  34.7654
Sale          1,068                34.4400
Sale          5,781                34.9951
Sale          51,439               34.6878
Sale          5,096                34.2058
Sale          2,399                34.4400
Sale          47,329               34.9618

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1068          34.4465
CFD            Short         15019         34.5853
CFD            Short         4300          34.6335
CFD            Short         5047          34.8461
CFD            Short         6359          34.8528
CFD            Short         47329         34.9618
CFD            Short         2000          35.1516
CFD            Long          5096          34.2058
CFD            Long          38146         34.6314
CFD            Long          6912          34.7261
CFD            Long          600           34.7654
CFD            Long          819           34.898
CFD            Long          5781          34.995

(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 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