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               20 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      26,924,227      2.77%      691,077       0.07%
securities
(2) Derivatives      202,625      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             27,129,702      2.79%      859,951       0.09%


(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      4,298                34.9228
Purchase      47,155               34.8464
Purchase      9,625                34.8188
Purchase      92,905               34.8417
Purchase      1,500                34.7885
Purchase      19,118               34.6641
Purchase      1,275                34.9500
Purchase      40,347               34.9150
Purchase      277,072              34.8500
Purchase      425                  34.6477
Purchase      483,164              34.4400
Purchase      2,147                34.9361
Purchase      7,696                34.8800
Purchase      33,363               34.9202
Purchase      6,222                34.8173
Purchase      58,275               34.9304
Purchase      400                  34.8442
Purchase      1,500                34.7885
Purchase      73,388               34.8358
Purchase      73,388               34.8358
Purchase      38,758               34.9639
Purchase      57,000               34.9300
Purchase      765                  34.9500
Purchase      2,020                34.9500
Purchase      5,400                34.3283
Purchase      5,900                34.8376
Purchase      19,200               34.9500
Purchase      2,147                34.9361
Sale          7,696                34.8800
Sale          38,758               34.9639
Sale          483,164              34.4400
Sale          1,275                34.9500
Sale          5,400                34.3283
Sale          2,414                34.9500
Sale          92,905               34.8417
Sale          57,000               34.9300
Sale          2,147                34.9361
Sale          5,900                34.8376
Sale          9,625                34.8122
Sale          40,347               34.9150
Sale          33,363               34.9171
Sale          73,388               34.8358
Sale          5,900                34.8376
Sale          92,905               34.8417
Sale          19,118               34.6610
Sale          47,155               34.8464
Sale          400                  34.8442
Sale          1,500                34.7885
Sale          4,298                34.9228
Sale          765                  34.9434
Sale          400                  34.8442
Sale          6,222                34.8107

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1887          34.4988
CFD            Short         17231         34.6822
CFD            Short         1500          34.7885
CFD            Short         9625          34.8188
CFD            Short         40347         34.915
CFD            Short         4298          34.9228
CFD            Short         2147          34.9361
CFD            Long          5400          34.3283
CFD            Long          1925          34.5234
CFD            Long          6222          34.8106
CFD            Long          5900          34.8376
CFD            Long          400           34.8442
CFD            Long          47155         34.8464
CFD            Long          31438         34.9411
CFD            Long          765           34.9433

(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                         21 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