It's mid-winter. The roads are icy. The gritting lorries are out in force, the pavements are slippery, and the news broadcasts are full of people telling viewers to "send us your pictures of snow." Everyone has a cold. The boiler has broken down again and the gas bill is due. The AA are busy advising comedians "not to tour the country unless it is absolutely essential." Despite all this, Punt and Dennis are Ploughing On Regardless.