Thanks to the wonderful guys at Hitchcocks my Royal Enfield has roared (well chugged) back into life. They had a 2nd hand CDI for 100 quid (320 new), ordered it yesterday, arrived today. Couldn;t wait to try it on the bike tonight, engine management lit up and pumped fuel all over me (left the pipe of the tank when I dismantled it 4 months ago!).

A couple of kicks and burst into life, just spent 2 hours putting everything back together and retaping the wiring I had ripped apart to check for burnt wires and tomorrow it will be ready for a test ride but it's started first kick several times now so certain all is okay. Now need to change the bloody horrendous exhaust as I intended to in March.