Random starting problem

[clayt74]

It's unlikely to be the solenoid, if it was stuck there would be no noise and jump leads wouldn't make a difference. The solenoid needs very little current to operate. More likely to be the starter motor stalling when in certain positions.

I really hope the battery does sort it for you!
But I would have thought a battery issue would be a more  regular fault rather than an intermittent one?
If it doesn't sort it, I still think starter motor. Good luck