Thanks Alice

The answers are most helpful and interesting and although it may not be a shock to find people here (and musicians generally), consider the voice to be an instrument, they give me plenty of ammunition to argue this particular issue with offers who do not.

In truth I growing a little weary of the 'is the audience legally part of the band' argument. It is most depressing when you read replies from outside the UK, who do not have the problems we have.