Ok, so Saturday started car as normal - ran for a minute or so as normal then stalled. Sat in the car, started instantly and went out for a couple or hours or so with no issues. Yesterday car started but wouldn't run without me applying some throttle. 10 miles later it still died at idle. Once it was properly warm all seemed fine. Tonight it's still won't idle without me applying some throttle. I've checked all the connections to various sensors on the car are fully clicked home. It's full of fuel (I filled it after 10 miles last night). Finally, it hasn't got wet for months. It's 7 months old with 2,300 miles.
I shall try to speak with Caterham tomorrow but suspect they will want to see the car. Any ideas about what I could check myself - it would be nice to avoid taking a day off work to do the 200 mile round trip to Sussex.