CHIMAERA WONT START

[Rhinox]

Hi
My much loved Chimaera of 20 years has been stood in the garage for 12 months. It has been on a trickle charger and the battery is showing full. Dash board lights come on, the fuel pump doesn't prime and the starter motor does not turn over. I have checked all the fuses and was wondering if this has happened to anyone else and what I should check next?
Many thanks

Edited by Rhinox on Tuesday 17th July 18:27

[Rhinox]

Hi everyone,
Thanks for all your help. I've disconnected the battery and reconnected after a few mins but still nothing, however when reconnecting the alarm didn't go off as it always has previously.
Dave, if you could send me you bypass instructions I'd be very grateful.

Thanks