So apparently this isn't an uncommon issue on Aero's, although new to me as my last one didn't suffer from it..
Basically go to crank and just get a load of starter solenoid clicking and flashing/flickering dashboard lights, I would usually point that straight to battery being weak, it should be fully charged as is on trickle charge and stored in a dry environment.
The car has had a new starter a few years ago so in my mind it seems unlikely it would be that, however if it is relatively common it would be good to know how everyone resolved their issue!
