I booked an apartment for 5 nights in the very last moment. Aida replied very fast so when I come to London I have a place to stay. The flat is in very nice house in calm and beautiful part of London. It's not so close to metro station (10-12 mins walk from) but there is a Sainsbury store next door to the building and tons of different cafes and restaurants around.
The was Wi-fi, personal bathroom and big bed in the bedroom.
So in Aida's place you will have everything you need for inexpensive price (as for London).