42/16 is fine, I'd just get any decent fixed wheel bicycle OTP for now and commute on it, something like the Charge Plug, Genesis Flyer, or even the On One Pompino (wait till they're like less than £400) is plentiful.
edit - Charge Plug 2 is a decent value in Wiggle at the moment, only thing worth changing is probably the handlebar for something sensible.
42/16 is fine, I'd just get any decent fixed wheel bicycle OTP for now and commute on it, something like the Charge Plug, Genesis Flyer, or even the On One Pompino (wait till they're like less than £400) is plentiful.
edit - Charge Plug 2 is a decent value in Wiggle at the moment, only thing worth changing is probably the handlebar for something sensible.