A - wife is a doctor so qualifies as essential staff (and may or may not have filled up my car for me the last time there was a fuel crisis).

B - I drive a diesel but I was half joking about the red option - not sure a newish BMW diesel engine would take kindly to that roughish agricultural derv - in fact knowing BMW the ECU would probably grass me up for using red diesel the next time the car is in for a service and the police would be immediately informed!

Matt.