I was happy to find the place as Lisa described. Although not very big, the flat met all my expectations of comfort, cleanliness and accessibility (Underground station and favourite museums are in close proximity). I discovered a secondary lift which is much closer to the flat than the main lift in the building and that was a bonus. The flat also got good light and that is great if you need to spend time indoors at your laptop.
All in all this all made my stay in London a great one. Thank you Lisa!