How important is heritage to today's bus industry? The Bus Inspectors are joined by Andrew Wickham and Anthony Delaine-Smith, two respected figures in contemporary bus operation, to discuss heritage fleets, brands and traditions, and what they mean to passengers and staff. We visit RM70 - the Routemaster's 70th Birthday celebrations - to find out how so many RMs have survived and which are the most important ones for continued preservation. Can they all live on forever? Plus, The Bus Inspectors meet preservationist Claire Fairbrother and her fleet of preserved Leyland Nationals to find out what makes each one special. Presented by David Sheppard.