A chief constable has been criticised after his car was reportedly caught speeding at nearly 100mph on the M1.
Derbyshire Chief Constable David Coleman, a staunch anti-speeding campaigner, was being driven by a chauffeur when the vehicle was stopped.
Traffic officers in Hertfordshire reportedly clocked the car doing 97mph as Mr Coleman returned from London.
Derbyshire Police confirmed a car carrying the chief had been stopped for a "road traffic offence".
"This is a serious speeding offence and one for which someone could expect an outright ban," said an RAC spokesman.
"Even though the chief constable wasn't driving, we expect public figures to set a good example.
"They are the ones involved in promoting road safety and to be involved in a speeding offence clearly doesn't send a positive message to the public."
The police chief was returning to his county after an engagement in London at the time of the incident.
Mr Coleman's force was one of the first in the country to create a Safety Camera Partnership.
It uses police, court and local authority resources to install extra speed
cameras in an attempt to reduce road deaths.
On Friday the team exhibited a stand at Birmingham's National Exhibition Centre, displaying a motorbike badly damaged in a collision to shock car users.
However, the chief constable's tough stance has incensed some motorists, with one man convicted of repeated attacks on local speed cameras.
A Derbyshire Police spokeswoman said: "The car was driven by a member of Derbyshire Police staff and the passenger was the chief constable.
"The matter is now being dealt with by Hertfordshire