Crawley, UK--(Marketwire - May 29, 2007) -
Form TR-1 with annex. FSA Version 2.1 updated April 2007
TR-1: Notification of Major Interests in Shares
1. Identity of the issuer or the underlying issuer of
existing shares to which voting rights are attached: Spirent Communications plc
2. Reason for notification (yes/no)
An acquisition or disposal of voting rights X
An acquisition or disposal of financial instruments which may result in the acquisition
of shares already issued to which voting rights are attached
An event changing the breakdown of voting rights
Other (please specify):______________
3. Full name of person(s) subject to notification BlackRock, Inc
obligation:
4. Full name of shareholder(s) (if different from
3):
5. Date of transaction (and date on which the
threshold is crossed or reached if different): 22nd May 2007
6. Date on which issuer notified: 25th May 2007
7. Threshold(s) that is/are crossed or reached: Gone above 5%
8: Notified Details
A: Voting rights attached to shares
Class/type of Situation previous to Resulting situation after the triggering transaction
shares the triggering
transaction
If possible use Number of Number of Number of Number of voting rights Percentage of voting
ISIN code shares voting shares rights
rights
Direct Indirect Direct Indirect
GB0004726096 N/A N/A N/A N/A 44,428,430 N/A 5.04%
B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial Expiration date Exercise/ conversion No. of voting rights Percentage of voting
instrument period/date that may be acquired rights
(if the instrument
exercised/converted)
Total (A+B)
Number of voting rights Percentage of voting rights
44,428,430 5.04%
9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are
effectively held, if applicable:
BlackRock Investment Management (UK) Limited - 44,428,430 (5.04%)
Proxy Voting:
10. Name of proxy holder:
11. Number of voting rights proxy holder will cease
to hold:
12. Date on which proxy holder will cease to hold
voting rights:
13. Additional information:
14 Contact name: Thomas Hone
15. Contact telephone name: 020 7743 2098
C: Additional information
Contact at Issuer: Michael Anscombe, Deputy Company Secretary, Spirent Communications plc
Telephone: 01293 767672
This information is provided by RNS
The company news service from the London Stock Exchange