Looking for a double bedroom in London

I am just a normal, positive person, moving back to London for my career, thus looking for a nice, respectful flat in London with a spare double bedroom.
Ideally I would live with people who like to keep the apartment at a reasonable level of cleanliness, and perhaps who are professionals as well.
Living with me is typically easy and peaceful, I always carry my fair share of responsibilities around the house and would be keen on contributing to a relaxed atmosphere in the household.