I love that part of Hampstead Heath by the big ponds, especially those big multi-windowed brown brick houses clustered along the edge. That’ll be them above. Not sure I’d like the famous night-time entertainment though; all those politicians out looking for votes, as it were.
Did this drawing over a couple of evenings (interrupted by baby-feeding). Below is the work-in-progress.
petescully 
Love these buildings. Very nice lines and nice color. Did you use watercolor, inks?
cheers! yes micron pigma 01 pen and cotman watercolours for the wash.