How great when somebody goes "beyond the call of duty" like that!
I think I may have posted a while back an experience I had in Westminster Abbey. i.e. I was in the Lady Chapel and I asked one of the guides which was Lord Nelson's seat. He led me over and showed me and then unhooked one of the ropes and said "You can go and try it out if you like!"
It sounds ridiculous in the cold light of day but
it so caught me off guard that I actually declined his offer.
I imagine I blew a once in a lifetime opportunity but how great to have been given the chance!
And not on the same level as yours - but I too, had a nice experience in St Paul's. I asked a person behind one of the counters if I could borrow a pen to write down some information (i.e. all the battles that are recorded on Wellington's memorial in the main body of the Cathedral.) He had a real rummage around and eventually found one that was spare.
When I took it back he said in a really friendly way how honest I was.
So 10 out of 10 for both Westminster abbey AND St Paul's from me!!

MB