Plate for use with signs in diagram 516 and 517 (TSRGDNO 519.1); This is a deprecated design or diagram, reconstructed from analysis of the 1981 Schedule, and the 2002 era working drawings.
Traffic Signs Regulations and General Directions 1981; Working drawings for Traffic Signs -  [1] namely the Alphabet Working Drawings here [2]- Redrawn
UK Government; R Vectorization:  ShakespeareFan00  14:52, 2 April 2017 (UTC)