If you are looking for the nearly perfect place to stay at during your stay in London, then get in touch with John. His apartment is so lovely and makes you feel somewhere you should be. It is very tidy, quiet, safe and equipped with most facilities you may need. The apartment is also very accessible with metro and bus stations nearby and only about 20 min to the city centre.
John himself is wonderful host. We didn't see him much but he was always available through the phone in case of anything. He welcomed us with a bottle of wine and interacted with us very warmly when he was available.
To sum up, I would totaly recommend.