I have just read some of the proposed legislation and there are a few ways of getting round it. One that appeals to me is the vehicles in motion exception i.e.
The provision of any entertainment or entertainment facilities—
(a) on premises consisting of or forming part of a vehicle, and
(b) at a time when the vehicle is not permanently or temporarily parked,
is not to be regarded as the provision of regulated entertainment for the
purposes of this Act.
So there you are, all future concerts should be on the back of a lorry. If indoors all members of the band to provide their own skate board or unicycle. I think the audience is gonna luv it.