Communication was easy with LondonFlats DFM. The location is great, there are several good and affordable restaurants in the neighborhood. It is easy to come to the house by transports from Gatwick airport or St Pancras train station. The house is 3mn by foot from a tube station (the line Victoria runs 24h on the weekend which is convenient).
The bathroom is smaller than we thought and the walls of the room are paper thin but apart from that, it is all fine and very clean. We enjoyed our stay, I recommend !