2018ish I was stopped in York, was probably lucky not to be fined. I'm in favour of reasonable enforcement, perhaps giving people a warning at first. But this approach in Grimsby especially if they are ignoring some people in favour of those they view as a easy target is wrong.
I was stopped in Oxford on Cornmarket Street once - timed restriction and it was less than an hour on the wrong side.
No fine, though, the council guy who approached me approached me because I was riding at walking pace. Meanwhile the deliveroo chap who went flying past at 15 mph? No attempt made to stop him - it would have been futile.
Had the council chap tried to fine me I'd probably just have ridden off at 20 mph, though.
Yes, we know the letter of the law, but frankly I'm more likely to shin somebody with a pedal if I'm dismounted and walking in cleats, rather than riding in a pedestrian manner.
The law also says that you must not ride on these hatchings. One would hope a bit of common sense would be applied.