Immobiliser fuse

Can someone let me know where the immobiliser fuse is on a S1?
I have just replaced the head after some work has been done on it connected the battery and everything is working but there is no power to the immobiliser. I have checked the fuses in the front and the 4 fuses above the relays in the cabin. There was another on its own in the middle of the cabin all these were OK. Just wondered if I had missed one.
Its been over a year without running and I thought I would get in going today bloody frustrating.