............just get out and ride
Assuming there's nothing drastically wrong with the bike it doesn't matter what bike you choose! Pick a warm dry sunny (if you get anything like that north of the Thames?) morning so you're wide awake, bright and a lert (remember Britain needs Lerts!) Start off slow and build it up gradually over a period of a few hours. You're lucky you haven't had any physical damage so you can get straight back out there, just take it easy and let yourself become absorbed by the riding experience. If you're anything like me it'll come back to you in no time as you relax into it until you suddenly realise you've done it!
Good luck with fixing the bike, that's the easy bit
