Historic walks - Fast and slow trains

John McCarthy takes a look at historic walks in the company of archaeologist Bill Bevan who selects Britain's top prehistoric sites best approached by foot and walks webmaster David Stewart who tells how you can follow ancient pathways all over the country from packhorse routes to corpse roads. John also compares fast and slow trains with journalist Tom Chesshyre maintaining that high speed railways have opened up Europe for passengers and travel editor Michael Kerr favouring a more leisurely approach to rail journeys.Producer: Harry Parker.