Katja's flat is immaculately clean. The rooftop is beautiful with some of the best views in London.
This flat is situated above the Lewisham train station so transportation all over London was very easy. This was our first trip to London and several people told us Lewisham wasn't a desirable area but we were enchanted by the hidden treasures in the neighborhood. Just a short walk away we found a wine and pizza restaurant, a charming burger place (Rox), and the Lewisham market had music, lights, and a variety of places to eat.
I recommend getting the travel pass if you're going to use the train and tube. We paid 30 pounds for a week of unlimited travel in London.