The Necropolis Railway by Andrew Martin
Set in 1903 and after a seemingly chance encounter young porter Jim Stringer lands a job at Waterloo Station, a far cry from his Yorkshire home. But the toff who engaged him needs a man on the inside to find out about the disappearance of other railway men on the line that carries dead bodies to the cemetery. Jim’s curiosity soon starts to find answers and will stand him in good stead for his career in the railway police in future novels in this series.