On my little tour last week on a few occasions we took blue signed routes with numbers in red boxes (are they the NCN ones?) with results that were at best mixed. (Nottingham was great, some others were a bit substandard/ suitable for mountain bikes only)
Yep. Red box number is NCN National, Blue box number is NCN Regional (so potentially not unique if you go a long way) and local routes vary with green box numbers currently most popular. Then there are named routes that have name and/or logo on the blue signs, and the meandering Hovis-sponsored National Byway which has brown tourist signs that say National Byway.
Oh and I think only roads were deleted from the NCN last year. Children can cope with any sort off boggy dirt track, according to Sustrans(!)
Can you imagine if we had M and A road signs funded by the lottery not taxes, then each county still making up its own signage system for B roads plus random named routes, and finally a food company putting up its own national tour route? It's as if the UK absolutely must avoid making cycling too easy at all costs!
