Wanted: single speed for two years’ commuting (~£250)

Hi all

Just moved to London and looking for a reasonably cheap single speed to see me through a couple of years commuting (when my visa will expire). Would love something with a bit of charm and character - a nice paint job, belt drive or other unusual features would go a long way!

The Wishlist (all totally negotiable!):
Price: £250? Or more for the right piece!
Frame: steel or alu, 58cm
Forks: cheap and cheerful
Bars: flat, bull or drop
Rims: deep profile, sealed bearings. Not hugely fussed about size, weight, spoke style etc
Brakes: anything decent
Tyres: anti-puncture (not a deal breaker by any means)
Pedals: I’ll be riding both with and without clips, so either touring style or clipless with a bit of platform to put a regular shoe on.
Saddle: Leather ideal, but anything will be fine really
Misc nice-to-haves:

1. Decent D-lock
   
2. Helmet
   
3. Floor pump
   
4. Rear mudguard
   
5. Bell
   
6. Multi tool
   
   

Thoughts welcome! I don’t want to spend ages hunting down the perfect solution, so I’m also considering just hitting up Goku, Re-Cycle or Camden Cycles for whatever they’ve got in stock. Any helpful hints would be appreciated.

Cheers
Rory