Contractors made an explosive find when they discovered an unexploded bomb in a Wrotham field.

They had been clearing shrubland on National Trust-owned land at Wrotham Water Farm yesterday evening when they found the device.

Measuring 10 inches long and half-an-inch thick, it is thought to be an smoke or incendiary bomb - possibly dating back from the Second World War.

Police and bomb disposal experts were called at 6pm and carried out a controlled explosion at around 6.45pm.

Tenant farmer David Goodworth lives around a mile from the explosion site.

He said: "We found out that a bomb had been found at around 6pm and the explosion happened shortly afterwards.

"We had the dogs barking and the windows rattling and then it was all done and dusted. We were very impressed by how efficient it was."

No one was evacuated during the explosion, which happened in a rural field.

National Trust warden Sam Pettman, who raised the alarm, said: "It is something I have never come across before in this job but it was all very low key and the bomb was not dangerous in any way for the contractors."