A broken down ambulance caused major delays for drivers heading into Watford during this morning's rush hour.

Police shut off one of two lanes in Stephenson Way between the M1 and Colonial Way industrial estate.

An ambulance was also at the scene - Hertfordshire Constabulary has now confirmed the ambulance was broken down.

The emergency vehicle was recovered at around 9.30am.

There were severe delays for motorists with long queues reported southbound on the M1 between Bricket Wood and Watford and on the A41 between Bushey and the M1 at junction 5 for Watford.

It was also gridlocked at the M1 roundabout.

Fortunately, all of the delays have now cleared.