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, 2006
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- ________
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT EXECUTIVE SHARE OPTION SCHEME
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 2,801,274 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme 415,240 ORDINARY SHARES OF 3 1/3p EACH
during period:
Balance under scheme not yet issued/allotted at end 2,386,034 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: U.S EMPLOYEE STOCK PURCHASE PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 1,237,364 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme NIL
during period:
Balance under scheme not yet issued/allotted at end 1,237,364 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT GLOBAL ALL EMPLOYEE SHARE PURCHASE PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 814,444 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme NIL
during period:
Balance under scheme not yet issued/allotted at end 814,444 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: NETCOM AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 4,369,664 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme 168,770 ORDINARY SHARES OF 3 1/3p EACH
during period:
Balance under scheme not yet issued/allotted at end 4,200,894 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: ZARAK AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 2,690,996 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme NIL
during period:
Balance under scheme not yet issued/allotted at end 2,690,996 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT SAVINGS RELATED SHARE OPTION SCHEME
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 114,388 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme 46,203 ORDINARY SHARES OF 3 1/3p EACH
during period:
Balance under scheme not yet issued/allotted at end 68,185 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT STOCK INCENTIVE PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 5,509,645 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme 1,055,959 ORDINARY SHARES OF 3 1/3p EACH
during period:
Balance under scheme not yet issued/allotted at end 4,453,686 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 6 January 2006
Name of applicant: SPIRENT PLC
Name of scheme: CAW AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JULY 2005 To: 31 DECEMBER 2005
Balance under scheme from previous return: 855,550 ORDINARY SHARES OF 3 1/3p EACH
The amount by which the block scheme has been NIL
increased, if the scheme has been increased since the
date of the last return:
Number of securities issued/allotted under scheme 19,151 ORDINARY SHARES OF 3 1/3p EACH
during period:
Balance under scheme not yet issued/allotted at end 836,399 ORDINARY SHARES OF 3 1/3p EACH
of period:
Number and class of securities originally listed and 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 29
the date of admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 28
MAY 2004
Total number of securities in issue at the end of the 965,789,582
period :
Name of contact: Michael Anscombe
Address of contact: Spirent plc
Spirent House
Crawley Business Quarter
Fleming Way
Crawley, RH10 9QL
Telephone number of contact: 01293 767676
SIGNED BY M Anscombe, Assistant Company Secretary_________________________
Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of
Spirent plc_______________________________________________
Name of applicant
If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.
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 6 January, 2006 By ____/s/ Luke Thomas____
(Signature)*