We will be recommending a minimum amount of £1 as part of the onboarding (But of course anything from 1p is an option)
We are thinking of the maximum amount a user can purchase as part of the onboarding should be set at £5
It's cool looking place and I like that you pay attention to details, like that famous 2009 Chancellor message on the entry door, and education and workshops is a great idea.
Maybe consider adding Bitcoin collectibles on wall, like newspapers, articles, images, books, bitcoin notes, and anything related with Bitcoin that is part of history, and don't forget to mention Bitcointalk forum

I guess website could be updated with more information and images, but that is just finishing touches.
Good luck and all the best with your new business!