Single person. Only offer from zone 1-3, please!!

Dear All,
I'm Przemek, 28 years old guy from Poland. Last couple of years I spent working on Santorini Island (Greece) and a cruise ship, sailing around the world. Now, I decided to move to London, so I'm looking for a single/double badroom for one person.
As a flatmate I'm a tidy and organized person. From time to time I like to watch some movie together or share a botlle of wine. However for most of the time you will not notice me, as I'm usually spend time outside and once I'm in my room, I'm sleeping, studying or working on my computer.
My perfect room would be around 12-16m2, furnished with modern style (should contain a bad, a wardrobe and some kind of desk) and has to be in zone 1-3.

Best regards,
Przemek

PS. I'd lived in London for 8 months in 2012, so if it's necessary I can provide references from my previous flatmates.