It would be great if there was an up to date listing for all of UK. Recently I was looking for sessions near Ambleside and after much frustrating googling found one potential session. Unfortunately it was cancelled for the 4 weeks of August with no indication on the website. I only found out by calling the venue just to check.

Any public information re sessions would have to be submitted and kept up to date by organisers who I am sure are stretched to capacity. Organisers need personal assistants.

Another thing. I currently attend 2 monthly sessions near Chelmsford. One group would happily welcome visiting performers. The more the merrier. The other I think would not.   I have attended 4 sessions of latter and feel quite marginalised.   What we learn from this is that it can be very awkward for the visitor if sessions are advertised/ promoted but the group tends to be ummm clique-ish. There needs to be some customer service training in this area.
The list of needs to keep sessions rolling on, well publicised, well attended, giving good service, etc. is growing. What we really need is gov'mint funding?

Snort! That is one sure way of slinging a spanner into the machinery. Get local authorities involved.
If it ain't broke.... fix it until it is.