According to the Midland Railway Company's weekly notices, this structure is the fourth signal box covering the Blea Moor Sidings area, but the first to be constructed on the 'up' side of the main running lines.
It opened on 16th December 1941 to replace an earlier structure on the ('down') side of the running lines (see Location ID 248590) and it is one of the most remote permanent workplaces on England's railway system. There is no road access to this site so, prior to starting work, the person operating the signal box must park his or her car at the foot of Ribblehead Viaduct, then walk along the track side for almost a mile. The signal box controls the adjacent sidings (Location IDs 248450 & 248620, plus the sections of main line across Ribblehead Viaduct and through Blea Moor Tunnel.
It originally coordinated with the boxes at Ribblehead (station) and Dent Head, but it now coordinates with the boxes at Settle Junction and Garsdale.
