Court hears 14-year-old was headbutted after the car he was in was stopped in Hanger Lane

A police officer has been convicted of assaulting a schoolboy after stopping the vehicle’s driver in Alperton for using a mobile phone.

PC Karl Bartlett, 42, of the Territorial Support Group, denied committing a “vicious, sustained and unprovoked attack” on the 14-year-old after he pulled over drive Lee Rosier, 24, in Hanger Lane on March 1 last year.

Westminster Magistrates’ Court heard Bartlett opened the car door and headbutted the teenager, who can not be named for legal reasons.

Both Mr Rosier and his passenger were said to have suffered a cut lip and facial injuries following the incident.

Last week, Barlett was convicted of common assault regarding the attack on the teenager.

PC Colin Nye, 37, was acquitted of the same charged and PC Anthony Read, 35, was cleared of assaulting Mr Rosier.

Bartlett will be sentenced on April 2.

All three officers remain on restricted duties and may face a misconduct hearing.