What I would add is that participatory folk activities like sessions, singarounds and Morris have and are now taking place in pubs. These are not in principle mainly intended to be public entertainment, as they are not usually provided or paid by licensees for this purpose.

Their participants are not performers, in the respect that they are under no obligation to even turn up, let alone play, sing or dance, if they do.

As such, these perfectly demonstrate the risks to traditional musical activites of the current (and most probably unchanged) broad legal definition of public entertainment, as performances of music and dancing (but not live TV in pubs), in the 95% of licensed premises that do not have PELs.