Does this rule/law mean two people can perform in a bar/pub at any one time, they finish performing and another 2, or solo, can get up and perform, and then another two etc.

The answer is that will we probably never know - as this question was never actually tested in the courts. When this situation occurs - the law becomes what those empowered to enforce it - say it is - and where they can change what they say it means - to suit themselves.

As from November 2005 - it will not really matter much and we will have many more such questions and definitions to concern us. The answer is to ensure that these aspect are subject to early challenge in court - then we can quickly establish if the unclearly-worded legislation needs to be changed to make these things more clear to us all.