I think that we can discount the legality of just about everything in the council's last letter. The comment I had when I asked for advice on this letter was that The council's advice is BULLS*$T.

Can the council officers explain that one?

Probably not - but they don't attempt to - they just ignore any mention of anything that does not fit...

Such as the following. This has been supplied to the officers but they have made no comment to date and appear to wish to simply ignore it and its specific relevance to the nature of these local sessions as considered by Parliament?

The following Commons quote from the then Minister concerned Dr Kim Howells made in the Bill's Standing Committee to Jim Knight MP on the 1st April 2003. This in direct response to a question about the local Cove session.
It seems that it is largely a spontaneous activity, to which people turn up occasionally and it seems also that the word has spread that people can hear some nice music. However, as the Hon Gentleman says, the licensee does not spend money on advertising. If it is clear that music is being played in the corner of the pub, that would be incidental in my book.