Holding(s) in Company

SIG PLC
01 June 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:

      SIG plc

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

An acquisition or disposal of voting rights (x )

An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached ( )

An event changing the breakdown of voting rights ( )

3.    Full name of person(s) subject tothe notification obligation :

      Prudential plc group of companies

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

Prudential plc                  4,957,804 3.68% Total Notifiable Interst

MAGIM HSBC GIS NOM (UK) SALI       39,107
PRUCLT HSBC GIS NOM (UK) PAC AC 4,734,543
PRUCLT HSBC GIS NOM (UK) PPL AC    42,000
PRUCLT HSBC GIS NOM (UK) EQBF AC   17,061
PRUCLT HSBC GIS NOM (UK) MNBF AC   25,435
PRUCLT HSBC GIS NOM (UK) PENE AC   99,658

Prudential Assurance Co Ltd      4,815,650 3.58
MAGIM HSBC GIS NOM (UK) SALI        39,107
PRUCLT HSBC GIS NOM (UK) PAC AC  4,734,543
PRUCLT HSBC GIS NOM (UK) PPL AC     42,000

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

     29 May 2007

6.   Date on which issuer notified: 31 May 2007

7.   Threshold(s) that is/are crossed or reached : See item 13

8.   Notified Details :

A: Voting rights attached to shares

Class/type of shares Situation previous to the triggering

If possible using the ISIN CODE transaction

GB0008025412 Number of Shares Number of Voting Rights

             4,935,969        4,935,969

Voting rights attached to shares

Class/type of shares Resulting situation after the triggering

If possible using the ISIN CODE transaction

Number of Shares Number of Voting Rights % of voting rights

                Direct     Direct     Indirect Direct Indirect

GB0008025412    4,957,804  4,957,804            3.68

B: Financial Instruments

Resulting situation after the triggering action

Type of Financial Expiration Exercise/     Number of voting % of voting rights
Instrument        date       Conversion    that may be acquired if the 
                             Period/Date   Instrument is Exercised/converted

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

4,957,804                 3.68

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

Prudential plc (parent Company)

The Prudential Assurance Company Limited (wholly owned subsidiary of Prudential
plc)

Proxy Voting:

10. Name of the proxy holder: N/A

11. Number of voting rights proxy holder will cease/acquire to hold: N/A

12. Date on which proxy holder will cease/acquire to hold voting rights: N/A

13. Additional information:

    As a result of the additional placing shares and sale of holdings, M&G Group
    Limited, M&G Limited and M&G Investment Management Limited (all wholly owned
    subsidiaries of Prudential plc) no longer have a notifiable interest (below
    5% and are now exempt from disclosure).

14. Contact Name: Emma Thompson

15. Contact: 020 7548 2293






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