I wrote to Marc at 9pm for a reservation for that same night, and got his answer immediately, with clear instructions as to how to get to his place. The apartment is super clean, bright, uncluttered, and has a real nice feel to it. The room is small and has all one might need - slept very well. Marc was very welcoming, interesting to talk to, and happy to share his home. The apartment is located in a calm neighbourhood, but super convenient to access - its on the northern line for all the fun of east London, and near London Bridge, which was great for me as I flew into Gatwick and there is a direct train there!
Overall a great experience - i'd recommend the flat highly!