LONDON (Dow Jones)--Spirent Communications PLC (SPT.LN) said Thursday it has purchased through RBS Hoare Govett 190,000 of its ordinary shares at an average price of 108.03 pence per share. MAIN FACTS: -These shares will be cancelled. -Shares closed Thursday at 108.5 pence. -By Tommy Stubbington, Dow Jones Newswires; 44-20-7842-9268; [email protected] (END) Dow Jones Newswires July 01, 2010 12:55 ET (16:55 GMT)