I would highly NOT recommend to stay at Simon’s house.
The room’s walls are full of mold and because of that the room smells bad and the sheets and towels are humid. He says in prior comments this is solved and it is not.
Also there’s not a good general cleaning (dust and spider webs in the room) and the bathroom has also poor cleaning.
And there’s not a possibility to lock the room.
We had to leave after the 2nd night because of all the mentioned above (london was full on the weekend so impossible to leave earlier).