My friends and I had a great time at Vincent's place! The flat is as described. It's a very nice apartment, clean, spacious and comfortable. It's located in a quiet, residential area, and there's a convenience store right next to it. It's well connected with the city centre by public transport (both underground and buses). Communication with Vincent was easy, fast, clear and friendly. Leslie, Vincent's wife, who showed me around when I arrived, was very nice and thorough. We would love to stay here again the next time we're in London! Highly recommended.
Thanks guys!