We loved our ten-days stay in Jocelyn's flat.
She is very friendly and funny, she always tries to help you but she is not invasive and she gives you the space you need. Her boyfriend is nice too.
The location of the flat is perfect if you want to explore the city, it's just few minutes from Waterloo station and Southwark station.
If you want to cicle, there's a hire cicle station just across the street.
The flat is clean and comfortable. The only problem is that you won't have the keys of your room and the bathroom!
We would probably rent their room again!