Shocking police footage shows a lorry driver holding mobile phones to each ear while behind the wheel on a motorway.
The unnamed motorist was caught by officers while travelling in the inside lane of the M4 in a 44 tonne HGV, released video shows.
Avon and Somerset Constabulary spotted the driver as part of a sting operation targeted at offending lorry drivers last week.
The mobile phone culprit appears to realise he is being filmed in the clip and moves to put one of the devices down as police pass.
The force used a loaned HGV to carry out Operation Tramline, checking on 409 drivers – of which 104 were found to be breaking the law.
Other offences spotted by officers include a motorist with just one finger on the wheel – and on the phone – while driving down the M4.
Chief Inspector Jason Shears said: “Driving whilst distracted is every bit as unacceptable as drink driving and just as likely to be fatal.
“Research has shown that drivers using a phone – handheld or hands free – are four times more likely to be involved in a collision and their driving is also impaired to a degree similar to that of a drink driver.
“Distraction driving is a top concern for motorists and we are committed to tackling it.
“Fortunately, we have the majority of the public behind us, many of whom are submitting footage of offences to us via our website.
“This means that anyone could be capturing evidence of offending that could be used to prosecute a phone-using or otherwise distracted driver, so the chances of being caught are now much higher.
Avon and Somerset Constabulary’s operation was mainly carried out on the M5, M4 and A303.
Of the 409 drivers checked, 51 were found to not be wearing a seatbelt, 11 were illegally using a mobile phone whilst driving, seven speeding, six not in proper control of their vehicle, five driving without due care and attention and two driving carelessly and inconsiderately.
Four drivers have been summoned to court as a result of the investigation, the force said.
Police also posted the footage on Twitter, where several people commented on the behaviour.
One said: “As a HGV driver I am absolutely sick to the stomach at seeing this. Hope they throw the book at him and he loses his license.
“It’s shocking to think what could have happened to innocent drivers on the motorway.”
Another added: “Unbelievable! He’s not only risking himself, but all the other drivers around him.”