Director/PDMR Shareholding

1.

Details of PDMR / person closely associated

Name

Elaine Sullivan

2.

Reason for the notification

a)

Position / status

Person closely associated with Gary Bullard, Non-executive Director

b)

Initial notification / amendment

Initial notification

3.

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Full name of the entity

Spirent Communications plc

b)

Legal Entity Identifier Code

213800HKCUNWP1916L38

4.

Details of the transaction(s)

a)

Description of the financial instrument

Identification code

Ordinary shares of 3 1/3 pence each

GB0004726096

b)

Nature of the transaction

Market purchase of shares

c)

Price(s) and volume(s)

d)

Aggregated information

- Aggregated volume

- price

15,000

GBP1.037300

e)

Date of the transaction

14 August 2017

f)

Place of the transaction

London

PDMR

Total holding

Gary Bullard

25,000