Worth banging on the door and asking about it. Have they pruned and
trained
it to make this tree shape?
I guess it might be Ceanothus Edinburgh which supposedly forms a more
upright specimen. I do not really understand the big leaf/little leaf
thing.

One of the few things that are upright on Leith Walk then, at least on a
weekend night. ;-)

I thought you were kidding until I looked it up. Now i'll have to get one
and support my local shrub!