Thanks Dave, I'll have a look up there. When I looked all I could see was a heatsink with something attached to it. I don't think there is a factory fit immobiliser. Shortly after mine was built they had an immobiliser in the key I think. My ignition switch looks like it's off a Montego! It's a horrible looking thing. Unless it was on a Morgan key ring I think it would be the last one taken out of the bowl at a swingers party!

I may end up asking the factory for advice, thanks for the contact there.