Beattock Summit (1016ft ASL) is the, as far as I can see, the highest point on the West Coast Main Line. It is a long climb from Beattock village which is at about 450ft ASL. Steam locomotives frequently required banking assistance in getting their heavy trains up the incline, particularly in the northbound direction, which had steeper gradients. There was an engine shed at Beattock which had banking locomotives on standby twenty-four hours per day to minimise train delays. The severity of the climb to the summit is referenced in W. H. Auden's poem Night Mail, written in 1936 for the G.P.O. Film Unit's celebrated production of the same name. Electric locomotives, as far back as the Class 86, as well as today's Virgin Trains services, climb the gradient without assistance.
The cache is a magnetic tupperware box with plenty of room for TBs. Please replace as found. TFTC
Congratulations to Elydm for the FTF!