An officer has been struck in a lorry crash on the M25 during Just Stop Oil protests this morning.
The incident has led to road closures between J26 and J27 clockwise, causing delays during the early rush hour on Wednesday.
Essex Police has not confirmed whether it was the result of activists who have been demonstrating in the area, and the cause of the accident is unclear so far.
The climate change campaign group is on its third day in a row of causing disruption on motorways.
Officers are also at J30 of the M25, where one Just Stop Oil protester climbed a gantry, with one person stopped.
Surrey Police confirmed a protester was on a gantry near junction 8 on the motorway.
The latest action comes after Just Stop Oil staged 32 days of disruption from the end of September and throughout October.
The Met said the protests resulted in 677 arrests with 111 people charged.
