2 January 2013

Spirent Communications plc ("Spirent" or the "Company")

Close Period share repurchase programme

Spirent announces that it has commenced an irrevocable, non-discretionary programme to purchase shares on its own behalf, for cancellation or placing into treasury, during its close period. The programme commences on 10 January 2013 and runs up to and including 27 February 2013.

Any acquisitions will be effected within certain pre-set parameters, and in accordance with both the Company's general authority to repurchase shares and Chapter 12 of the Listing Rules which requires that the maximum price paid to be limited to no more than 105 per cent of the average middle market closing price of the Company's shares for the 5 dealing days preceding the date of purchase. The Company confirms that it currently has no unpublished price sensitive information.

Further enquiries:

Rachel Whiting                    +44 (0)1293 767676     

Company Secretary

Spirent Communications plc