Hoping for some advice from experienced people.

I was excited when I saw John Dipper was doing concertina workshops for beginners.

But in the programme it says there will be 10 people only, and it's first come first served. So - is there likely to be a long queue and what time would one need to get there? It's Sunday morning and I don't want to miss my breakfast to be disappointed. Anyone have any (sensible) advice?

thanx