I am going to replace battery today it is original so may be going weak after 6 years.
I did charge it with m charger but same result.


Nothing else odd, always has a couple of turns with starter before it fires....ran strong the previous night - oddly I went to the BMW UDE event, she might have got envious of the new M5 AWD I drove and praised - parked at night and next day morning the problem started...