The coastal railway line between Folkestone and Dover is one of the most stunning in Britain, but it is also one of the most challenging to operate – reputed to be the most expensive stretch to maintain in the whole country. It is built through a landscape that is continually at threat of landslides and ground movement, as Rhys Griffiths discovered when he visited the site with Network Rail to learn more about the challenges of keeping this tricky track open… We are standing on a small chalk ridge overlooking the Warren, a site of special scientific interest just outside Folkestone, with cliff…
