Under the British Railways modernisation plan, diesel traction began to replace steam at a significant pace on many rural lines during the late 1950s. Great emphasis was placed on staff instruction to bring large numbers of locomotive crew up to speed on the new diesel multiple unit rail cars being introduced. A series of films screened in mobile instruction coaches and in motive power training schools helped to teach footplate crews (who were used to a very different environment indeed how to drive these new multiple unit diesel trains. This particular episode in the series deals with the real meat of the training - getting to grips with your train. A Derby 'Heavyweight' unit and a training trip to Skegness are on the cards for us.