Belfast·SPG008 Advertising and Signage·Page 8·2.4.2
Traffic Sign Resemblance Restrictions
It is an offence to display any sign resembling a traffic sign on or near a public road under the Road Traffic Regulation (Northern Ireland) Order 1997.
Article 34 of the Road Traffic Regulation (Northern Ireland) Order 1997 makes it an offence to display any sign which resembles a traffic sign on or near a public road.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/belfast/SPG008 Advertising and Signage.pdf