We enjoyed our time in Mark’s apartment. It is the right size for two people, it was quiet (no noisy neighbors or traffic), and clean. You should be aware that you have to go up about a half flight of stairs to access the lift. We were delayed at Heathrow by long queues at passport control but the cleaner remained after checkin time to accommodate us. Though we didn’t use them, the instruction booklets for the washer and dryer were out, we have had problems in other European rentals with these appliances as the controls were hard to decipher so a plus for Mark. Another plus is a nice pub across the street at the corner to relax from your journey.
We would definitely consider Mark’s place on a return visit to London.