Looking for a Nice Room/Studio/1 bed in London

Cambridge commuter working at an advertising agency in London looking for a double room, studio, or 1 bedroom to rent. The ideal location would be within easy access to public transportation like tube or train stations for commuting to the office.

A clean, furnished room in a safe neighbourhood is preferred. Amenities like wifi and access to the kitchen are a plus. Excellent references are available. Non-smoker, quiet, responsible professional willing to pay competitive rent for the right room situation. Fairly flexible on the move-in date. The Sooner the better but I'm in no rush at all to be honest.