Cambridgeshire Fire and Rescue Service was called to the incident at about 11am. One crew from St Neots, one crew from Cambridge and a crew from Gamlingay were called to a fire on the A428. A spokesman for Cambridgeshire Fire and Rescue Service said: Firefighters arrived to find a lorry on fire on a slip road near Dry Drayton on the westbound carriageway. Wearing breathing apparatus they extinguished the fire using hose reels and returned to their stations by 12.55pm. The cause of the fire was accidental.