LONDON (Dow Jones)--Spirent Communications PLC (SPT.LN) said Friday it has purchased through RBS Hoare Govett 50,000 ordinary shares at an average price of 108.46 pence per share. MAIN FACTS: -These shares will be cancelled. -Shares closed Friday at 110.1 pence. -By Tommy Stubbington, Dow Jones Newswires; 44-20-7842-9268; [email protected] (END) Dow Jones Newswires July 02, 2010 12:34 ET (16:34 GMT)