56046 approaches Stewartby on 29 May 1993 with the Hertfordshire Railtours 1Z40 15:13 Bedford to Euston 'Mothball' railtour. This train was run to mark the closure (or mothballing in case of future use) of the Claydon Junction to Bletchley section of the route. Two decades later it looks like the line is finally going to get a reprieve and a substantial upgrade.