I have a lovely large double-bedroom to rent in my 4 bed house with garden for £800 p/m. The room is very sunny and bright and faces the garden and the entire house is very quiet as it is on a hill away from a private road which is only for the people who live there so no traffic whatsoever. You can never hear any cars only a lot of birds!
The house is in Dulwich Village next to the Woods, great for running walking etc. Sydenham Hill Station is very close and gets you into Victoria in 15 min and Blackfriars in 20 min. There is also another station closely that gets into London Bridge.
I am a Prof of Neuroscience at the University and am working a lot and hence am looking for someone quiet.