Holding(s) in Company

Weir Group PLC
24 January 2007



TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

   The Weir Group PLC


2. Reason for the notification (please state Yes/No):

   An acquisition or disposal of voting rights: (No)

   An acquisition or disposal of financial instruments which may result in the
   acquisition of shares already issued to which voting rights are attached:(No)

   An event changing the breakdown of voting rights: (No)

   Other (please specify): Initial notification due to change of threshold for
   non-material interest (Yes)


3. Full name of person(s) subject to the notification obligation (iii):

   Prudential plc group of companies


4. Full name of shareholder(s) (if different from 3.):

   See attached schedule


5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

   20 January 2007


6. Date on which issuer notified:

   23 January 2007


7. Threshold(s) that is/are crossed or reached:

   5%


8. Notified details:


A: Voting rights attached to shares


Situation previous to the triggering transaction

Class/type of shares if possible using the   Number of      Number of voting
ISIN CODE                                    shares         Rights

GB0009465807                                 14,173,442           14,173,442


Resulting situation after the triggering transaction

Class/type of shares if    Number of     Number of voting       % of voting
possible using the ISIN    shares        rights                 rights
CODE

                           Direct        Direct    Indirect    Direct   Indirect

GB0009465807               14,173,442    14,173,442            6.82%


B: Financial Instruments

Resulting situation after the triggering transaction

Type of     Expiration Exercise/     Number of voting rights that may   % of
financial   Date       Conversion    be acquired if the instrument is   voting
instrument             Period/ Date  exercised/ converted.              rights

N/A         N/A        N/A           N/A                                N/A



Total (A+B)
Number of voting rights               % of voting rights

14,173,442                            6.82%


9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

   See attached schedule


Proxy Voting:

10. Name of the proxy holder:

    N/A


11. Number of voting rights proxy holder will cease to hold:

    N/A


12. Date on which proxy holder will cease to hold voting rights:

    N/A


13. Additional information:

    None


14. Contact name:

    Emma Thompson


15. Contact telephone number:

    020 7548 2293


Schedule:

Percentage holdings are calculated using an issued share capital of 207,710,968
ORD GBP0.125 shares.


PRUDENTIAL PLC
Registered Holder                                           Holding          %

MAGIM HSBC GIS NOM(UK) SALI                                161,021
NORTRUST NOMINEE LTD A/C MHF01                              44,129
NORTRUST NOMINEE LTD A/C MHJ01                             761,529
NORTRUST NOMINEE LTD A/C MKM01                             700,000
NORTRUST NOMS LTD                                           96,658
NORTRUST NOMS LTD A/C CRI01                              2,500,000
NORTRUST NOMS LTD A/C PUF01                                230,662
NORTRUST NOMS LTD A/C PUQ01                                700,000
NORTRUST NOMS LTD A/C PUR01                              2,944,661
PRUCLT HSBC GIS NOM(UK) PAC AC                           5,389,488
PRUCLT HSBC GIS NOM(UK) PPL AC                              68,069
PRUCLT HSBC GIS NOM(UK) EQBF AC                             73,560
PRUCLT HSBC GIS NOM(UK) MNBF AC                            108,360
PRUCLT HSBC GIS NOM(UK) PENE AC                            395,305
                                       Total            14,173,442        6.82


M&G GROUP LIMITED
Registered Holder                                           Holding          %

MAGIM HSBC GIS NOM(UK) SALI                                161,021
NORTRUST NOMINEE LTD A/C MHF01                              44,129
NORTRUST NOMINEE LTD A/C MHJ01                             761,529
NORTRUST NOMINEE LTD A/C MKM01                             700,000
NORTRUST NOMS LTD                                           96,658
NORTRUST NOMS LTD A/C CRI01                              2,500,000
NORTRUST NOMS LTD A/C PUF01                                230,662
NORTRUST NOMS LTD A/C PUQ01                                700,000
NORTRUST NOMS LTD A/C PUR01                              2,944,661
PRUCLT HSBC GIS NOM(UK) PAC AC                           5,389,488
PRUCLT HSBC GIS NOM(UK) PPL AC                              68,069
PRUCLT HSBC GIS NOM(UK) EQBF AC                             73,560
PRUCLT HSBC GIS NOM(UK) MNBF AC                            108,360
PRUCLT HSBC GIS NOM(UK) PENE AC                            395,305
                                       Total            14,173,442        6.82



M&G INVESTMENT MANAGEMENT LIMITED
Registered Holder                                           Holding          %

MAGIM HSBC GIS NOM(UK) SALI                                161,021
NORTRUST NOMINEE LTD A/C MHJ01                             761,529
NORTRUST NOMINEE LTD A/C MKM01                             700,000
NORTRUST NOMS LTD                                           96,658
NORTRUST NOMS LTD A/C CRI01                              2,500,000
NORTRUST NOMS LTD A/C PUF01                                230,662
NORTRUST NOMS LTD A/C PUQ01                                700,000
NORTRUST NOMS LTD A/C PUR01                              2,944,661
PRUCLT HSBC GIS NOM(UK) PAC AC                           5,389,488
PRUCLT HSBC GIS NOM(UK) PPL AC                              68,069
PRUCLT HSBC GIS NOM(UK) EQBF AC                             73,560
PRUCLT HSBC GIS NOM(UK) MNBF AC                            108,360
PRUCLT HSBC GIS NOM(UK) PENE AC                            395,305
                                       Total            14,129,313        6.80


M&G LIMITED
Registered Holder                                           Holding          %

MAGIM HSBC GIS NOM(UK) SALI                                161,021
NORTRUST NOMINEE LTD A/C MHF01                              44,129
NORTRUST NOMINEE LTD A/C MHJ01                             761,529
NORTRUST NOMINEE LTD A/C MKM01                             700,000
NORTRUST NOMS LTD                                           96,658
NORTRUST NOMS LTD A/C CRI01                              2,500,000
NORTRUST NOMS LTD A/C PUF01                                230,662
NORTRUST NOMS LTD A/C PUQ01                                700,000
NORTRUST NOMS LTD A/C PUR01                              2,944,661
PRUCLT HSBC GIS NOM(UK) PAC AC                           5,389,488
PRUCLT HSBC GIS NOM(UK) PPL AC                              68,069
PRUCLT HSBC GIS NOM(UK) EQBF AC                             73,560
PRUCLT HSBC GIS NOM(UK) MNBF AC                            108,360
PRUCLT HSBC GIS NOM(UK) PENE AC                            395,305
                                       Total            14,173,442        6.82





Annex to Notification Of Major Interests In Shares


A: Identity of the person or legal entity subject to the notification obligation


Full name (including legal form for legal entities):

Prudential PLC


Contact address (registered office for legal entities):

Laurence Pountney Hill, London, EC4R 0HH


Phone number:

020 7548 2293


Other useful information (at least legal representative for legal persons):

Emma Thompson


B: Identity of the notifier, if applicable


Full name:

M&G Investment Management Limited


Contact address:

Laurence Pountney Hill, London, EC4R 0HH.


Phone number:

020 7626 4588


Other useful information (e.g. functional relationship with the person or legal
entity subject to the notification obligation):



C: Additional information:

None




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