Turnberry (Girvan).
AFAIK it's still nominally open, but I've not heard of anyone landing there lately.
It's still shown as open on the latest half-mill I have in front of me, but it's not in any of the flight guides I have.
There is a "driving challenge" held periodically at "Turnberry Old Airfield" which doesn't sound too good. Bit like a certain Top Gear Airport in the South...