My young family of four stayed at Kyrill & Lisa's place and were really happy we booked with them. The pictures don't do the place justice, it really is a nice and perfectly situated location.
It is a ground floor flat, but there is really no noise to be heard from the street. We actually forgot we were in a flat as the neighbors were essentially silent.
If you are looking for a place to stay in London, that is close to central via a few tube stops away, stay at Kyrill & Lisa's place!