The Drivers' Hours (Passenger and Goods Vehicles) (Exemption) Regulations 1991
These Regulations exempt from the remaining requirenments of section 96(1) to (6) of the Transport Act 1968 a driver who during any working day or any working week spends time in driving passenger or goods vehicles and who spends time driving or on duty during that day or week to met the special need occasioned by severe weather conditions or the effects or consequences of severe weather conditions in respect of that day or that week.