Caravans Mr. Adley asked the Chancellor of the Exchequer what annual revenue would accrue to the Exchequer if all caravans used on public roads were subject to a road fund tax equivalent to the current rate applicable to motor cars. Mr. Robert Sheldon Most caravans are on the road for about two weeks a year, and on the assumption that a four-monthly licence would be taken out and a refund claimed for three months the yield would be about £1·6 million.