So after trying various ideas and suggestions from TM members I had a chat with Len at BHM over the phone when he listened to the engine turning over he thought it a little slow.
Len's suggestion was to try a jump start in case the battery was not providing enough oomph.
Tried this and although it didnt work straight away she eventuarry did start.
Generally I do runs of over 30 mins at least 4 times a week so the battery gets plenty of chanrging, but maybe this was disguising its true condition.
Anyway now it's time to find a replacement for the original Banner Uni Bull 50 200 which they no longer make (sems like it might be a banner power bull p60 09