Excessive battery draw when ignition off

Hi All

I am hoping someone can help me with a fault that has appeared in the last couple of days.

Went out to van yesterday morning and could not even unlock it remotely as the battery was totally dead. I disconnected the battery and charged it for about 8 hours. Returned to it last night, popped the battery cables on and it started fine. I left it for two hours and it was dead again.

I suspected the battery had been killed with the cold weather however i charged it up again and...

Excessive battery draw when ignition off