A directional arrow to be added to Permissible Speed Warning Indicators to indicate that the speed restriction applies only to routes that diverge to the left.
This model depicts the standard self-reflecting style of board introduced in the mid-1980s, with white face and yellow border signifying Imperial units.
Version 41: Initial release for TS2009+, uses mesh library <kuid:209453:23100> and name changed from UK Speed Advance Left to UK Speed Warning Left