JAN 2001 AUII Wont Crank/start

[Kryton]

Have a bit of an issue with a Jan 2001 AUII Sedan at the moment.
Car was recently bought but not really used so has sat around for a couple of months.
It had been thought the battery was flat so we jump started the car and drove it 60km home.
Drove fine, no issues other than a small stutter from a lead i suspect.
Started the car again after arriving home and it started fine.
Tried it a few hours later when it was cold, it cranked over fine but didnt start after 3 or 4 turns so let the key off and tried it again - nothing at all.
Doesnt tick, doesnt crank.
Electrics work, battery was reading 12.5v, tried jumping and still nothing at all.
Still is the same today. tried giving the starter motor a crack - didnt change anything.
Fuses all seem fine.
Theres only 1 key and no FOB.
Smartshield hand flashes on dash normally when car is off.
Smartshield hand goes out when put to ACC.
Smartshield hand stays on when holding key in START position.
When held in START position, a ! with a circle around it appears and stays on till the key is released.
Fuel pump seems to work as well.

Ideas on what to try, look at or whats going on would be appreciated.
As this isnt my car, ive limited knowledge of its history but i did mention that it was thought to have a flat battery after it was bought and left for the couple of months (unreg) so was only moved around the yard. Im thinking the "flat battery" issue may have been something else and coincidentally, its come good and started after playing around with the battery for a bit.