Today is proving to be a numerically challenged day. The Daily Mail has problems with years and now this:

There are speed cameras along the A46 in the roadworks near the junction with the M40. The speed limit has been lowered to 40mph and signs light up to warn speeding motorists of the new limit. I was driving at 38mph, according to the speedometer in the car. This didn't stop the sign from flashing at me telling me to slow to 40mph.