Blocklisting Interim Review

SIG PLC
06 February 2006



                    BLOCKLISTING SIX MONTHLY REVIEW


1. NAME OF COMPANY:          SIG PLC



2. NAME OF SCHEME:           THE SHEFFIELD INSULATIONS GROUP PLC -
                             SAVINGS RELATED SHARE OPTION SCHEME



3. PERIOD OF RETURN:   FROM: 4 AUGUST 2005     TO:  3 FEBRUARY 2006



4. NUMBER AND CLASS OF SHARE(S)            449,570 ORDINARY 10P SHARES
   (AMOUNT OF STOCK/DEBT SECURITY)
   NOT ISSUED UNDER SCHEME
   AT END OF THE LAST PERIOD:



5. NUMBER OF SHARES ISSUED/ALLOTTED        NIL
   UNDER SCHEME DURING PERIOD:



6. BALANCE UNDER SCHEME NOT YET ISSUED/    449,570 ORDINARY 10P SHARES
   ALLOTTED AT END OF PERIOD:



7. NUMBER AND CLASS OF SHARE(S)            949,752 ORDINARY 10P SHARES
   (AMOUNT OF STOCK/DEBT SECURITIES) 
   ORIGINALLY LISTED AND THE DATE OF 
   ADMISSION:


PLEASE CONFIRM TOTAL NUMBER OF SHARES      TOTAL NUMBER OF SHARES IN ISSUE
IN ISSUE AT THE END OF THE PERIOD          AT 3 FEBRUARY 2006 WAS 121,897,147
IN ORDER FOR US TO UPDATE OUR RECORDS.



CONTACT FOR QUERIES                        R C MONRO

NAME:                                      RICHARD MONRO
TELEPHONE:                                 0114 285 6355



DATE                                       6 FEBRUARY 2006

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