POLICE have released a video of a van driver who was hogging a lane on the M4 for more than a mile, as a reminder to drivers.

Dashcam footage captured by Thames Valley Police and posted on TVP Roads Policing shows the driver staying in the third lane even though the police car had the siren and emergency lights were on.

READ MORE: RECKLESS DRIVER GOES WRONG WAY DOWN M4

The footage was captured near Reading.

The police officer was en route to a report of a drink driver further down the M4.

The Tweet said: 'Please, when driving on the motorway or a dual carriageway, when the lane to your left is free, move into it!

'This #Lane3Hogger on the #M4 #Reading failed to see my marked BMW 530 with blue lights flashing & siren etc.

'Took them over a mile to see me & pull over! RT!'