McGrath of Harlow
Regarding your post of 19th December, you make the comment about a " small spped limit sign sign".
In UK speed limit signs must be of a particular size at the beginning and ending of a limited stretch of road, with smaller repeater signs at regular intervals, depending upon whether or not the street is lit and the distance between lamp standards.
All local authorities have to abide by these national requirements. Any failure by the local authority can deem the signing to be confusing and any relevant court case should throw out the case.

In the same vein, I have noticed that there are a number of areas in UK with 30 mph signs on unlit roads. I was taught during all of my tests (ordinary driving licence, Public Service Vehicle Class 1, Heavy Goods Vehicle Class 1, and Police Class 1) that a 30 mph limit was demarcated by street lights at no more than 200 yard (metre) intervals and the conventional 30 mph signs.
Could someone with a legal bent please tell me if the "rules" have changed to allow 30 limits on unlit streets. Also are the speed limit signs flanked by yellow backgrounds legal? Where is the government information to motorists?
Colyn.