There is a sign on the gantry above the start of the A1 / M1 that I cant find the meaning of.
Its here , although not in this picture.
View Larger MapWhere the 30 currently is , it looks like the National speed limit sign , but has a red bounding circle.
Does anyone know what it is or have they just been lazy and put in in the orginal 30 sign and forget about the red circle ?