we had a very unfortunate trip to London because of canceled and then delayed flights. We were supposed to get to the apartment at around midnight but thanks to a delay we got there just 3am, everything was as it is described before to get in the place but another person staying at the apartment locked the door from inside and we couldnt get in. At this time of the night the owners didnt pick up the phone anymore even tho we tried like 15 times to call. I guess it depends how deep people sleep in general, I dont know...we ended up looking for a hotel in the area at 4am. We got the refund from the owners back and apology.