Holding(s) in Company

RNS Number : 4156J

Spirent Communications PLC

02 December 2008

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
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		Χ
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 MHJ01 NORTRUST NOMINEE LTD A/C MKB01 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):	01 December 2008
6. Date on which issuer notified:	02 December 2008
7. Threshold(s) that is/are crossed or reached:	11%
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	75,889,199	75,889,199	75,889,199	75,889,199		11.22%

B: Financial Instruments
Resulting situation after the triggering transaction xii
Type of financial instrument	Expiration date xiii	Exercise/ Conversion Period/ Date xiv	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