I got done doing 38 in a 30 driving home from work. Saw the police car but didn't notice the police woman stood behind it resting the camera on the roof of the car till it was too late. As soon as I saw her (Virtually level with the car, too late to brake) I looked down and my Speedo actually told me I was doing 41 and not the 38 the letter said.
Opted for the online course full of dread, but it wasn't as bad as I thought. The instructor was sound (looked like Mike Dean), got everyone involved and had a bit of a laugh and joke when the time was right. Learnt a few things too.