Thanks for the comments. I thought it was 10% +2 mph; so that gets you to 35 in a 30. I reckon I was about 38 when I first saw it, then lifted straight off, as a natural reaction I suppose. On the return journey the trap had moved on, but the spot did look to be a 30 limit, coming off a national speed stretch, as I was then heading into the built up bit.
Have to see what Postman Pat brings. Curious though, do those radar things in the police vans just take an instant speed reading, or does it take a couple of readings as you approach? Will check out the website mentioned.
I live on a 30 stretch, with double yellows, so nothing to slow cars down, and the cars are often blasting by at what seems like well over 70 mph, .......Never had a mobile out here, more's the pity!
It's not fair! Ha ha.