I've had a very nice stay at Jelena's house with 4 friends for a week during London Olympics, with clean and cozy rooms and a safe shelter for our 5 bicycles in the back garden.
Unfortunately Jelena wasn't there during those days but her daughters Sanja and Ivana were always available for any need.
The location is very peaceful in a residential area inside Greater London, the connection with the town center could be easier (about 1h by bus+tube) but the place ideal for people who want to visit also the surroundings along the Thames.