I was there on Wednesday last week after the very hot Monday.
It was warm but not unbearable. I was on the auto belays and the huge ceiling fan blew a cool breeze. It wasn't too bad.
In compassion I went to Depot Sheffield on Thursday evening and it was 30C inside and unbearable.
I think the big shed coped much better.
(Yes I know it was nice outside but my lad was in NICAS with his mates)