A second crash in Witham is causing delays because of onlookers. 

The Londonbound carriageway of the A12 is partially blocked due to a two-vehicle crash between junction 22, Witham north, and junction 21, Witham south. 

The incident happened at about 4.19pm and traffic is queuing northbound between junction 19, Boreham Interchange, and junction 22, Witham north, because of the onlookers.

Update 4.40pm: There are long delays back to junction 24, Kelvedon north/B1024. 

Update 4.50pm: Firefighters were called to the scene and reported that no one was trapped.

They worked to ensure the scene was safe by 4.35pm