Mark's apartment is in a perfect location for walking around London. It's just as you see In the photos, clean and beautifully decorated. Mark was fantastic with communication and gave us tips on where to eat locally, this made our trip even more enjoyable. We will definitely come back when we are next visiting London.
Just one thing I would advise, take some ear plugs, if you sleep with the window open it can be quite noisy (being so central you have to expect this).