This is the make and model I have - Raleigh Chinook, though my one is blue and black, with big silver mudguards to keep me clean. It's a cheap end bike, less than £200, but in London anything more valuable becomes a risk, while if this gets nicked it's covered by my house insurance. Over the years I've had two whole bikes nicked, plus a saddle and saddle post (now chained on) and a front axle pin, which was very annoying.
Mine is currently resting in the back yard with a flat back tyre which I forgot to fix yesterday, but I ride to work most days unless it's raining, about 7 miles each way. It's a delight in the Summer, much fresher than the tube journey, and takes about the same amount of time.
My journey avoids main roads where possible, they're suicide for a cyclist in London. I've only been knocked off once, though I've had a couple of tumbles of my own devising over the years.
I usually inflate to 110 and the bike has a suspension seat that I made a little bouncier. 
