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 2004
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- ________
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: CAW AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 1,205,164 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 40,438 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 1,164,726 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
admission: DATED 15 AUGUST 2002
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 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
ALL FIGURES HAVE BEEN REVISED FOR THE 3:1 SHARE SPLIT ON 11 MAY 2000
Name of company: SPIRENT PLC
Name of scheme: SPIRENT EXECUTIVE SHARE OPTION SCHEME
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 1,587,494 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 0 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 1,587,494 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 09/2000
admission:
Please confirm total number of shares in issue at the end of the period in order for us to update our
records 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: U.S. EMPLOYEE STOCK PURCHASE PLAN
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 4,980,140 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 25,104 ORDINARY SHARES
during period:
Balance under scheme not yet issued/allotted at end 4,955,036 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
admission: ADMITTED 5 JUNE 2001
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
Please confirm total number of shares in issue at the end of the period in order for us to update our
records 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: GLOBAL ALL EMPLOYEE SHARE PURCHASE PLAN
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 700,052 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 0 ORDINARY SHARES
during period:
Balance under scheme not yet issued/allotted at end 700,052 ORDINARY SHARES
of period:
Number and class of share(s) (amount of stock/debt 1,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 18
securities) originally listed and the date of NOVEMBER 2002
admission:
Please confirm total number of shares in issue at the end of the period in order for us to update our
records 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
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: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 6,666,672 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 389,988 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 6,276,684 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 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: ZARAK AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
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 0 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
admission: DATED 14 NOVEMBER 2000
Please confirm total number of shares in issue at the end of the period in order for us to update our
records 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: SPIRENT SAVINGS RELATED SHARE OPTION SCHEME
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 0 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 1,065 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 198,935 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
admission: DATED 31 DECEMBER 2003
Please confirm total number of shares in issue at the end of the period in order for us to update our
records 944,031,413
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:
BLOCK LISTING SIX MONTHLY RETURN
To: Listing Applications
UK Listing Authority
Old Broad Street
London
EC2N 1HP
(020 7588 6057)
Name of company: SPIRENT PLC
Name of scheme: SPIRENT STOCK OPTION PLAN
Period of return: From: 01 JULY 2003 To: 31 DECEMBER 2003
Number and class of share(s) (amount of Stock/debt 0 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 411,032 ORDINARY SHARES
period:
Balance under scheme not yet issued/allotted at end 7,013,601 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
admission: DATED 1 OCTOBER 2003
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 944,031,413
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 _12 January 2004 By ____/s/ Luke Thomas____
(Signature)*