Andrew Ingamells is an excellent draughtsman who is probably the finest architectural artist in Britain today.
His depictions of Westminster Cathedral and the Brompton Oratory (amongst others) are in the Parliamentary Art Collection, and he has done Loggan-style portrayals of the colleges of Oxford and Cambridge as well as three of the four Inns of Court in London.
The above capriccio is a wonderful treat. I think someone should build it.