This apocalyptic scene shows the aftermath of an arson attack in which bales of hay were set alight.
The blaze broke out on Thursday, February 20, between 5pm and 2.30am in a farm in Baker Street.
Over 850 bales of straw were torched in the fire, causing around £35,000 worth of damage.
Hertfordshire Constabulary is now appealing for witnesses, which closed the road and caused severe traffic at junctions 23 and 24 of the M25.
Anyone with information is asked to call 101.