I find the red circle enforced limits quite dangerous at times
I religiously (I'm bad like that) stick to them - whilst others appear to practically ignore them - all fine and good except where you get the 40 limit ones - which is quite common on the M25.
if you do 40 and everyone else is doing 55-60+ I find it quite scary
I like driving fast but I stick to speed limits at all times - partly as I obey the law and also because I wouldn't want that feeling for weeks afterwards about whether I'd get a letter in the post ..
also when no red circle - are the cameras on at 70 ?
last night in some companies wisdom there were 3 sets of VERY wide loads on the M25 - taking up more than 1 1/2 lanes - causing a right traffic jam - I think they were cranes or something, each one a mile apart, with 3 support vehicles - all fine - but at 6.30pm at night ? a bit rude if you ask me - why pick rush-hour - what would have been wrong with the middle of night to avoid inconvenience to others ?