A safety sign from the The Private Crossings (Signs and Barriers) Regulations 1996, Diagram 101; posted at level crossings where overhead electrical wires were present, warning people riding on horses to dismount, as they could be too close to overhead wires while on the horse.
Drawn according to The Private Crossings (Signs and Barriers) Regulations 1996 and RSSB standards.
UK Government
This file: The Navigators