One of the great pleasures of the last few weeks has been seeing the Lovelace Courtyard come together in the backyard between Burlington House and Burlington Gardens, which David Chipperfield describes as a ‘demilitarised zone’, a bit of green in the heart of London, somewhere for staff to sit out and, as of last night, for the students to play pingpong.   It was designed by Peter Wirtz, the son of Jacques Wirtz who designed the gardens at Alnwick Castle:-