i think i have an alternator in me spares draw i would need to test it
but i once had an issue with my car like this where it had been stood for 8 months tried bumping it jumping it from 3-4 batteries but no start
called the aa out and he was confused after a phone call he came back to the car with a big screw driver and then disconnected the battery and then shorted the + to the -
once that was done it started no bother and ran fine all the way up to the mot center
he said it was static from all the battery's i had connected messing up the immobilizer