I hope they have a vegan/vegetarian option up soon! I have a peanut and tree nut allergy, so I can only personally speak to that, and they did make me talk to the chef even though I was ordering items I get there often. It was good to know though that all desserts were safe minus any cross contamination, which is fine for my allergy but I know some people aren’t that lucky.
I did find some tables to be cramped together, more so towards the entrance. We were seated next to the stairs of the upper portion and had plenty of room. This might be something you can request if you call to make your reservation, but you could definitely request a more secluded table when you check in as this was not a seat yourself event. The restroom situation might be an issue. I would actually recommend leaving the patio and using the public restrooms in the UK. Walking through the pub was a nightmare. Granted it was 8:45 on a Friday night during a Festival, but it was insane. The women’s restroom also only has 2 stalls and is very tight. I went again after the show and the place was absolutely trashed, I felt so bad for the employees.