Providing you use axle stands in these positions you can run the engine whenever you wish - I did so last winter whilst awaiting a few bits for the brake overhaul.
http://www.gomog.com/allmorgan/jackpoints2.htmlACF50 and a good light pressure hose down underneath after a winter run out just in case there is still a residue of powdered salt around.
A spirited run over Dartmoor on a frosty morning is a wonderful bracing experience followed by a heart attack on a plate at Princetown handsome.
A lot more of the newer owners are using them all year round now, I'm surprised you haven't seen many around your way.
