Around 2 am the police switched off the floodlights at the front gate and rushed in four riot vans blasting out Wagner's Ride of the Valkyries which was the theme music of the film Apocalypse Now and also Adolph Hitler's favourite music.
There was a stand-off lasting about 20 minutes during which the police kept shouting out random numbers before they were ordered back into their vans and they drove off and the lights came back on again.
One of the campers shouted at the police: "How would you like it if someone attacked and abused and intimidated your children like this?"
There was another call-out about 4 am at the back gate when the riot police marched en masse towards the back gate and hundreds of climate campers gathered again to try to prevent another possible attack against them.
A number of people were quite seriously injured during the vicious onslaught by the riot police on Monday afternoon.
The sudden attack on the peaceful protesters sitting down at the back gate took them by surprise and the police lashed out at everyone including women and very young children.
About 40 riot police managed to break through onto the site but were chased back out again by angry campers shouting "out, out, out".
Several officers fell over in their rush to escape.
The Metropolitan police commanders responsible for ordering the attack are being investigated for possible private criminal prosecutions.