"The promise is that..." - but how much is a promise from this government (or any government) worth? Insofar as it is possible to make sense of such a badly worded act there's nothing to make them stick to that promise, or any of the other warm words that have occasionally been uttered.

It's going to be interpreted in different ways in different places and at different times. In some places it may allow more music to happen, but in others it'll mean less. The overall effect will be to prevent the kind of innovation and flexibility that could allow live infomal and semi-formal music to flourish.