Once upon a time, the current Mrs Nolan and I decided to do some missionary work in Clevedon in the West Country.  This being the first Holiday Weekend after the schools broke up. Well true to form, the clever people who decide such matters thought it would be a good wheeze to close the old Severn Bridge thus transforming the new one into a modern ten-mile, traffic jam.  Congratulations.  Having been blessed with cat-like reflexes I did a quick recalculate…