After yesterday's long Idle period when it wouldn't start and what I assumed was nothing more than letting it cool down for ten to fifteen minutes and all was fine , I went out for a localish ride this afternoon to Marlborough and the bike cut out out near Ogbourne ! I wasn't sitting around with the engine running , just riding with plenty of air to keep it cool . I sat again for ten minutes and she started fine and ran all the way back to Swindon until about half a mile from home and did it again , another breather and off we went again . This has never happened before in 8 years . I know there's not a lot of information here , but it was never an issue until it sat there for a prolonged period yesterday . Is it possible I've finished the spark plugs off ???