Hi
Just to avoid any confusion (at least on my perception of the suggested offer).
I thought the suggestion of money approx sixty pounds was on a per-person basis.
Taking into account Az (who I have had the pleasure to meet before through Chris W G) is going to give up a fair chunk of a productive chef's day, to teach / demonstrate to a bunch of curry-heads and cover that much content - at the same time, most likely bombarding him with questions at a very unreasonable rate - this sounds a more than fair price to me.
I really hope this goes ahead - I cannot wait

Cheers