Venues can play music if they have a PRS licence. I couldn't find one on the PRS db for either the venue or the Nasty Party. But that doesn't mean there wasn't one. A licence provides limited use. It doesn't cover adding it to a show or advertising (which have to be negotiated) or any possible case of false association which has been used successfully in the past. It's easy enough to make a case for false association simply on the basis that the music was clearly used to support a theme, 'Blue' Cassette - uplifting music to support the PMs 'uplifting' (or vomit inducing) message. The Tories have form for this, having been criticised by performer after performer, Rhianna, Calvin Harris, Florence and the Machine. etc etc. Rather than support UK artists, the Tories are happy to undermine their credibility and impartiality. In any reasonable definition this is missue. Anyone with basic respect would consider this theft. But what are the Tories to do? Walk out to Cliff Richard every time? They have no one else.