Holding(s) in Company

RNS Number : 8346V

Spirent Communications PLC

19 January 2012

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			X
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	Hermes Equity Ownership Services Limited
4. Full name of shareholder(s) (if different from 3.):^iv	Shares are held by the relevant custodian(s)
5. Date of the transaction and date on which the threshold is crossed or reached: ^v	18 January 2012
6. Date on which issuer notified:	19 January 2012
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	2%

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

0472609

GB0004726096

20,725,973

N/A

16,804,058

N/A

2.53819%

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

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}

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

16,804,058

2.53819%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: ^xxi
BT Pension Scheme Trustees Limited, as trustee of the BT Pension Scheme ("BTPS") controls Britel Fund Trustees Limited, which is the parent undertaking of Hermes Fund Managers Limited ("HFML"). HFML is the parent undertaking of Hermes Equity Ownership Services Limited ("HEOS") (voting rights: 2.53819%)* * This notification is being made in respect of HEOS, which is an indirect holder of shares for the purpose of DTR 5.2.1(h) as a result of control of voting rights in relation to such shares.

Proxy Voting:
10. Name of the proxy holder:		See Comment in Section 9
11. Number of voting rights proxy holder will cease to hold:		See Comment in Section 9
12. Date on which proxy holder will cease to hold voting rights:		See Comment in Section 9

13. Additional information:
14. Contact name:	Valerie Davidson (v.davidson@hermes.co.uk )
15. Contact telephone number:	020 7680 2177