We can definitely recommend Christian's place for a stay in London.
Really nice and spacious apartment in walking distance from several vital locations.
The underground is just a 5min walk, Tower Bridge is nearby, and a good store nearby as well. All you need for a nice weekend in town.
Christian is very welcoming as well and was very flexible in accommodating us. He is very knowledgeable of the area, easy to contact with questions and very fast with reply's.
We loved our stay in London and we'll definitely be back sometime in the near future.