Holding(s) in Company

RNS Number : 2531L

Spirent Communications PLC

07 January 2009

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 the notification (please tick the appropriate box or boxes)
An acquisition or disposal of voting rights		Χ
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 the notification obligation:	Prudential plc group of companies
4. Full name of shareholder(s) (if different from 3.):	MAGIM HSBC GIS NOM(UK) SALI NORTRUST NOMINEE LTD A/C MHF01 NORTRUST NOMINEE LTD A/C MKM01 NORTRUST NOMS LTD NORTRUST NOMS LTD A/C PUF01 NORTRUST NOMS LTD A/C PUI01 NORTRUST NOMS LTD A/C PUQ01 NORTUST NOMS LTD A/C PUR01 PRUCLT HSBC GIS NOM(UK) PAC AC PRUCLT HSBC GIS NOM(UK) PPL AC PRUCLT HSBC GIS NOM(UK) EQBF AC PRUCLT HSBC GIS NOM(UK) MNBF AC PRUCLT HSBC GIS NOM(UK) PENE AC
5. Date of the transaction (and date on which the threshold is crossed or reached if different):	05 January 2009
6. Date on which issuer notified:	06 January 2009
7. Threshold(s) that is/are crossed or reached:	11% to 10%
8. Notified details:

A: Voting rights attached to shares
Class/type of shares (if possible using the ISIN CODE)	Situation previous to the Triggering transaction		Resulting situation after the triggering transaction
	Number of Shares	Number of Voting Rights	Number of shares	Number of voting rights		% of voting rights
			Direct	Direct	Indirect	Direct	Indirect
GB0004726096	75,923,770	75,923,770	73,563,797	73,563,797		10.95%

B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date	Exercise/ Conversion Period/ Date	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights
N/A	N/A	N/A	N/A	N/A

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Prudential plc (parent Company)

M&G Group Limited (wholly owned subsidiary of Prudential plc)

M&G Limited (wholly owned subsidiary of M&G Group Limited)

M&G Investment Management Limited (wholly owned subsidiary of M&G Limited)

The Prudential Assurance Company Limited (wholly owned subsidiary of Prudential plc)

Proxy Voting:
10. Name of the proxy holder:	N/A
11. Number of voting rights proxy holder will cease to hold:	N/A
12. Date on which proxy holder will cease to hold voting rights:	N/A