It’s the people who think NSL means “drive at 60” regardless of the road which scare the crap out of me.
Round here, that’s mostly lanes - single car width, passing places, high hedges, blind bends, tractors, wildlife, walkers, cyclists and horse riders.
And yet absolute muppets - some of whom are probably posting on this thread - try to drive around them at 60. Even 40 is fucking dangerous. But no, it’s NSL so anyone doing 30 is dangerous 🙄
As for the poster who mentioned going around a blind bend at 59 and rear ending someone - that would not be the fault of the person doing 40, ever. If it’s a blind bend, you cannot drive around it faster than you can stop if there’s an obstruction. People driving slowly may be irritating, they may be legitimate (tractor / trailer / whatever) or they may be a shit driver - but they’re less dangerous than a fuckwit taking a blind bend at 60mph.
Not that this is relevant to the OP, because if you’re doing 40 in 30s, you’re definitely in the wrong and driving like a twit.