Holding(s) in Company

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments ^{xv, xvi}

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise price

Expiration date ^xvii

Exercise/
Conversion period ^xviii

Number of voting rights instrument refers to

% of voting rights ^{xix, xx}

RNS Number : 4019M

Spirent Communications PLC

06 May 2015




TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ⁱⁱ		Spirent Communications plc
2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights			Y
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):
3. Full name of person(s) subject to the notification obligation: ⁱⁱⁱ	Aviva plc & its subsidiaries
4. Full name of shareholder(s) (if different from 3.):^iv	Registered Holder: BNY Norwich Union Nominees Limited 2,884,142* Chase (GA Group) Nominees Limited 26,413,340* Chase Nominees Limited 490,550* *denotes direct interest BNY (Nominees) Limited 237,077 Chase Nominees Limited 1,161,835 Vidacos Nominees Limited 1,664,334
5. Date of the transaction and date on which the threshold is crossed or reached: ^v	05 May 2015
6. Date on which issuer notified:	06 May 2015
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	5% to 4% Change at Direct Interest Level

8. Notified details:
A: Voting rights attached to shares ^{viii, ix}
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 ^x
					Direct	Direct ^xi		Indirect ^xii	Direct		Indirect
Ordinary Shares GB0004726096	40,597,969		40,597,969		32,851,278	29,788,032		3,063,246	4.87%		0.50%


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

Total (A+B+C)
Number of voting rights	Percentage of voting rights
32,851,278	5.37%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: ^xxi
The voting rights are managed and controlled by Aviva Investors Global Services Limited, with the following chain of controlled undertakings:- Aviva Investors Global Services Limited: · Aviva plc (Parent Company) · Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc) · Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva Group Holdings Limited) · Aviva Investors Global Services Limited (wholly owned subsidiary of Aviva Investors Holdings Limited)

Proxy Voting:
10. Name of the proxy holder:	See Section 4
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:

Figures are based on the total number of voting rights of 611,741,888 as per the Company's Total Voting Rights and Capital Announcement of 01 May 2015.

14. Contact name:

Neil Whittaker, Aviva plc

15. Contact telephone number:

01603 684420

C: Additional information

Contact at Issuer: Michelle Balch, Assistant Company Secretary, Spirent Communications plc

Telephone: 01293 767676

This information is provided by RNS

The company news service from the London Stock Exchange

END

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