A police officer has been injured in a collision involving two lorries while responding to Just Stop Oil protests taking place on the M25.
Essex Police say a person was arrested for causing a public nuisance for protesting on the motorway, although the cause of the crash is unclear.
The force said a police officer was struck and injured by the vehicle after a rolling blockade was set up due to someone in the road.
He added that the incident resulted in road closures between Junction 26 and Junction 27 clockwise.
There have been other reports of people on gantries near junctions 29 and 30.
Motorists have been urged to avoid the area and seek alternative routes as multiple police forces deal with the protests.
Chief Superintendent Simon Anslow said: “Officers again responded quickly to minimize disruption and two people have already been arrested.
“One of our officers was injured while working to help resolve this situation.”
The incident resulted in road closures between Junction 26 and Junction 27 clockwise.
It comes after Just Stop Oil said around 10 of its supporters climbed onto overhead gantries at ‘several locations’ on the M25 from 6.30am on Wednesday – the third day in a row of protests on the busiest motorway in the world. UK.
The protesters were also joined by activists from Animal Rebellion – who campaign for “a plant-based food system”.
Officers warn that the ongoing action will disrupt traffic in the area.
Elsewhere, Surrey Police confirmed a protester was on a gantry near Junction 8 on the highway.
The force said: “Officers are proactively patrolling the rest of the M25, as they have been doing all week.”
The M25 is closed between junctions 7 and 8 clockwise.
Kent Police said officers responded to a report of protesters near Junction 4.
The Metropolitan Police said on Twitter: “We stand ready to respond to any protest activity on #M25 with partner forces again today.
“We know this disruption is incredibly frustrating for the public.”
The force added that officers are currently at the scene at Junctions 24 and 25, where a protester “has locked himself in a gantry”.
He added that the locks add “more complexity for our removal teams”, so officers had to use specialist equipment for the move, including a JCB.
Just Stop Oil said in a statement: “This is not a one day event, expect us any day and anywhere.
“This is an act of resistance against a criminal government and its plan for genocidal death.
“Our supporters will be back today, tomorrow and the day after, and the day after, and every day until our demand is met: no new oil and gas in the UK.”
National Highways has won a High Court injunction to stop Just Stop Oil protesters from disrupting England’s busiest motorway.
The court has granted a new injunction to end unlawful protests on the M25, which circles Greater London, in a bid to end the disruption of the busy road by the environmental group.
Just Stop Oil staged 32 days of disruption from late September and through October, resulting in 677 arrests and 111 people charged, with Met Police officers working a total of 9,438 extra shifts .