We reported in June 2008 that PRS for Music was increasing its monitoring of music played in the workplace and in other premises, to check whether such businesses hold the appropriate licences. This trend is continuing.
In recent months it has become apparent that PPL is also conducting an aggressive enforcement campaign. It seems that PRS for Music and PPL share information. If your business needs licences from both of these organisations but only has a licence from one of them, then your business may well be a target for investigation by one of these organisations.