UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of January 2005
SPIRENT plc
_____________________________________________________________________
(Translation of registrant's name into English)
Spirent House, Crawley Business Quarter, Fleming Way, Crawley, West Sussex
RH10 9QL, UK.
_____________________________________________________________________
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.
Form 20-F X Form 40-F.....
Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes ..... No X
If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: SPIRENT EXECUTIVE SHARE OPTION SCHEME
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 4,562,114 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during 40,380 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 4,521,734 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
securities) originally listed and the date of SEPTEMBER 2000
admission:
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: U.S. EMPLOYEE STOCK PURCHASE PLAN
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 1,985,764 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the
last period:
Number of shares issued/allotted under scheme 84,088 ORDINARY SHARES
during period:
Balance under scheme not yet issued/allotted at end 3,701,676 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 435,000 ORDINARY SHARES OF 3 1/3p EACH
securities) originally listed and the date of ADMITTED 5 JUNE 2001
admission:
3,500,000 ORDINARY SHARES OF 3 1/3p EACH
ADMITTED 1 NOVEMBER 2001
7,000,000 ORDINARY SHARES OF 3 1/3p EACH
ADMITTED 18 NOVEMBER 2002
1,800,000 ORDINARY SHARES OF 3 1/3 p EACH ADMITTED 6
DECEMBER 2004
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: GLOBAL ALL EMPLOYEE SHARE PURCHASE PLAN
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 332,044 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the
last period:
Number of shares issued/allotted under scheme NIL ORDINARY SHARES
during period:
Balance under scheme not yet issued/allotted at end 1,032,044 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt
securities) originally listed and the date of
admission: 1,000,000 ORDINARY SHARES OF 3 1/3p EACH ADMITTED 18
NOVEMBER 2002
700, 000 ORDINARY SHARES OF 3 1/3 p EACH ADMITTED 6
DECEMBER 2004
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
ALL FIGURES HAVE BEEN REVISED FOR THE 3:1 SHARE SPLIT ON 11 MAY 2000
Name of company: SPIRENT PLC
Name of scheme: NETCOM AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 5,986,513 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during 1,207,333 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 4,779,180 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 3,291,399 ORDINARY SHARES OF 3 1/3p EACH DATED 03/
securities) originally listed and the date of 09/1999
admission:
1,739,130 ORDINARY SHARES OF 3 1/3p EACH
DATED 8 JULY 2002
6,722,689 ORDINARY SHARES OF 3 1/3p EACH
DATED 8 OCTOBER 2002
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: ZARAK AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 2,690,996 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during NIL ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 2,690,996 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 3,895,474 ORDINARY SHARES OF 3 1/3p EACH
securities) originally listed and the date of DATED 14 NOVEMBER 2000
admission:
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: SPIRENT SAVINGS RELATED SHARE OPTION SCHEME
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 186,355 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during 5,543 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 180,812 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 200,000 ORDINARY SHARES OF 3 1/3p EACH
securities) originally listed and the date of DATED 31 DECEMBER 2003
admission:
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: SPIRENT STOCK INCENTIVE PLAN
(FORMERLY KNOWN AS SPIRENT STOCK OPTION PLAN)
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 5,632,934 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during 1,171,558 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 4,461,376 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 3,720,930 ORDINARY SHARES OF 3 1/3p EACH
securities) originally listed and the date of DATED 1 OCTOBER 2003
admission:
3,703,703 ORDINARY SHARES OF 3 1/3p EACH DATED 2
OCTOBER 2003
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
SCHEDULE 5
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS
Name of company: SPIRENT PLC
Name of scheme: CAW AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2004 To: 31 DECEMBER 2004
Number and class of share(s) (amount of Stock/debt 929,607 ORDINARY SHARES OF 3 1/3p EACH
security) not issued under scheme at end of the last
period:
Number of shares issued/allotted under scheme during 51,506 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 878,101 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 1,300,000 ORDINARY SHARES OF 3 1/3p EACH
securities) originally listed and the date of DATED 15 AUGUST 2002
admission:
115,394 ORDINARY SHARES OF 3 1/3p EACH
DATED 28 AUGUST 2002
Please confirm total number of shares in issue at the end of the period in order for us to update our
records
956,241,665
Contact for queries: Address: Spirent plc
Name: Michael Anscombe Spirent House
Telephone: 01293 767676 Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Person making return
Name: Michael Anscombe
Position: Assistant Company Secretary
Signature:
Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
______LUKE THOMAS______
(Registrant)
Date 07 January 2005 By ____/s/ Luke Thomas____
(Signature)*