Professional male seeks double room

I am a full-time professional and am looking for a change of scene after 2 years in my current house. I am quite quiet in general and am looking for housemates who respect each other's personal space, though I am happy to chat around the house. I prefer working in the office though do occasionally work from home.

I am looking for somewhere fairly central (zones 1/2, though will consider zone 3) and/or close to the tube. I work in Westminster so somewhere easily connected to there would be best, though this is not a deal-breaker. I am not looking for a party house but am happy to have a chat over a drink.

Outside of work, I enjoy history, politics, languages, chess, cats and long walks. I am especially addicted to books and long-distance train journeys (often at the same time). I am looking to share with friendly people who I can get to know socially, but equally appreciate having my own space.

I am looking to move by the end of July.