Thanks for the ideas on the immobiliser, I'll have a look under the column shroud. Some Caterhams seem to have the same system and require the key to be close to the aerial

WRT the clutch bleed nipple, I've traced the fluid line to the bellhousing and by removing the rubber grommet can see it entering the concentric slave cylinder but still can't see a nipple. I'll put new batteries in the torch and look again.

I'll check the year/model but I'm pretty sure that's what he told me ....