Thanks, David Heath - but don't let them ignore the fact that the restrictions do not just hit music in pubs. For example, there was a string quarter in a bookshop that got closed down, and any coffee bar that invites or allows people to play music is likely to get itself into trouble.
If something akin to skiffle were to start happening today, it wouldn't get off the ground, with the present restrictions - which won't be affected by a change in licensing arrangements for pubs so far as I can see.
(Have a chat some time with your colleague Bill Rammell (MP for Harlow) about these things.)