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 July, 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- ________
BLOCKLISTING SIX MONTHLY RETURN
To: The FSA
Date: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT EXECUTIVE SHARE OPTION SCHEME
Period of return: From: 1 JANUARY 2005 : 30 JUNE 2005
Balance under scheme from previous 4,521,734 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted 1,720,460 ORDINARY SHARES OF
under scheme during period: 3 1/3p EACH
Balance under scheme not yet 2,801,274 ORDINARY SHARES OF
issued/allotted at end of period: 3 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: U.S EMPLOYEE STOCK PURCHASE PLAN
Period of return: From: 1 JANUARY 2005 TO: 30 JUNE 2005
Balance under scheme from previous 3,701,676 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted 2,464,312 ORDINARY SHARES OF
under scheme during period: 3 1/3p EACH
Balance under scheme not yet 1,237,364 ORDINARY SHARES OF
issued/allotted at end of period: 3 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT GLOBAL ALL EMPLOYEE SHARE PURCHASE
PLAN
Period of return: From: 1 JANUARY 2005 To: 30 JUNE 2005
Balance under scheme from previous 1,032,044 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted 217,600 ORDINARY SHARES OF 3
under scheme during period: 1/3p EACH
Balance under scheme not yet 814,444 ORDINARY SHARES OF 3
issued/allotted at end of period: 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: NETCOM AMENDED AND RESTATED STOCK OPTION
PLAN
Period of return: From: 1 JANUARY 2005 TO: 30 JUNE 2005
Balance under scheme from previous 4,779,180 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted 399,516 ORDINARY SHARES OF 3
under scheme during period: 1/3p EACH
Balance under scheme not yet 4,379,664 ORDINARY SHARES OF
issued/allotted at end of period: 3 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: ZARAK AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JANUARY 2005 To: 30 JUNE 2005
Balance under scheme from previous 2,690,996 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted NIL
under scheme during period:
Balance under scheme not yet 2,690,996 ORDINARY SHARES OF
issued/allotted at end of period: 3 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT SAVINGS RELATED SHARE OPTION SCHEME
Period of return: From: 1 JANUARY 2005 To: 30 JUNE 2005
Balance under scheme from previous 180,812 ORDINARY SHARES OF 3
return: 1/3p EACH
The amount by which the block NIL
scheme has been increased, if the
scheme has been increased since the
date of the last return:
Number of securities 66,424 ORDINARY SHARES OF 3
issued/allotted under scheme during 1/3p EACH
period:
Balance under scheme not yet 114,388 ORDINARY SHARES OF 3
issued/allotted at end of period: 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: SPIRENT STOCK INCENTIVE PLAN
Period of return: From: 1 JANUARY 2005 To: 30 JUNE 2005
Balance under scheme from previous 4,461,376 ORDINARY SHARES OF
return: 3 1/3p EACH
The amount by which the block scheme 4,000,000 ORDINARY SHARES OF
has been increased, if the scheme 3 1/3 p EACH
has been increased since the date of
the last return:
Number of securities issued/allotted 2,951,731 ORDINARY SHARES OF
under scheme during period: 3 1/3p EACH
Balance under scheme not yet 5,509,645 ORDINARY SHARES OF
issued/allotted at end of period: 3 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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: 8 July 2005
Name of applicant: SPIRENT PLC
Name of scheme: CAW AMENDED AND RESTATED STOCK OPTION PLAN
Period of return: From: 1 JANUARY 2005 To: 30 JUNE 2005
Balance under scheme from previous 878,101 ORDINARY SHARES OF 3
return: 1/3p EACH
The amount by which the block scheme NIL
has been increased, if the scheme
has been increased since the date of
the last return:
Number of securities issued/allotted 22,551 ORDINARY SHARES OF 3
under scheme during period: 1/3p EACH
Balance under scheme not yet 855,550 ORDINARY SHARES OF 3
issued/allotted at end of period: 1/3p EACH
Number and class of securities 3,000,000 ORDINARY SHARES OF
originally listed and the date of 3 1/3p EACH DATED 29
admission: SEPTEMBER 2000
3,000,000 ORDINARY SHARES OF
3 1/3 p EACH DATED 28 MAY
2004
Total number of securities in issue 964,084,259
at the end of the 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.
END
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 08 July 2005 By ____/s/ Luke Thomas____
(Signature)*