Two people were also arrested for causing a public nuisance as the climate group began its third day of action on the busy motorway. Essex Police said the “serious” incident, which happened on Wednesday morning, led to road closures between J26 and J27 clockwise. The force confirmed that the collision and subsequent injury to a police officer was a result of activists protesting in the area. Essex Police told The Telegraph: “One person was arrested as officers quickly responded to reports of people trying to access crane bridges across the M25. “Initially officers intervened to deal with a protester on the motorway between junction 26 and 27. Because of this a rolling roadblock was put in place. “Then there was a collision between two trucks and a police car. “Fortunately the motorcyclist was not seriously injured.” A Just Stop Oil spokesman said this morning’s collision was “an awful situation” but doubled down on its cause, adding: “Under normal circumstances this would be unacceptable.” Follow the latest updates below