Guess they didn't like you then. Unless your reckless or being cheeky, you normally get a slap on the wrist. There is a 10% + 3mph grace but its up to the officers discretion
I was at the back of a row of cars trundling along........it was a sneaky parked camera van thingy. Checked on google.......minimum is 35 in a 30 to get a ticket.