Well, what I have found out so far.
I played around yesterday trying to track down where the problem was, checked voltage on battery when started, 13v, good. Ignition on for 20-30 mins whilst stripping off electric start and following cables, checked battery again, nothing, dammit!
Got my brother in law round tonight and pinched the battery off his SV1000, started mine no probs, not a problem with the electrics then.
Swapped my battery back in and bump started it (damn that's hard work, took two of us pushing to get it started), got it stated but it doesn't seem to generating enough juice to power the bike electrics, the lights dim when revved and the dials go loopy.
Thinking it might be the alternator or maybe the battery?