Description: The following is extracted from the 'North Norfolk Railway plc Directors' Report & Financial Statements for the year ended 31st January 2004': 'Holt Signal Box.... Formerly the signal box was the Upper Portland Sidings Box from near Kirkby-in-Ashfield. It is a typical Midland Railway style box and totally appropriate for an M & GN station.' 1) North Norfolk Railway: operates a preserved railway over part of the former Midland & Great Northern Joint Railway system. 2) Elsewhere in the report it is stated that the box arrived via the Midland Railway Centre at Butterley (Derbys.)