Lovely stay at Sharon's! The flat is much bigger than it appears on the photos, very bright and comfortable. Sharon and her husband were very welcoming. There was jam, milk, tea... loads of little essential things in the kitchen which was very nice.
The flat is very close to PettsWood forest, and 30 min train ride from center London (adding a 20 min walk to the station).
Overall, it was a lovely stay!