In February 1980 Doncaster Power Signal Box extended its area of operation to include Grantham. In our latest new feature Andy Overton provides a unique insight into the work of signalling in a power box, including the vital role of communication with station staff at Grantham. There's also the frustration of prioritising train movements effectively through an over-rationalised track layout in the era of the privatised railway. It's a fascinating read.