20 in a car is painful. It takes far more concentration to keep the speed that low and far more time is spent looking at the speedo. I would say my driving is more dangerous keeping to 20 than it is keeping to 30 as I spend far less time watching the actual road!
Ouch!
I got flashed doing 26 in January but no letter came through for me!
I'm usually in Wales at least twice a week and now delight in crawling along at 19 smiling at the long snake forming behind me!