A section of Britain's busiest motorway has had to be closed for the second time in three days - again due to a serious accident.
The Highways Agency is starting initial work on an upgrade to the M25 between Kent and Surrey.
Two widening schemes on Britain's busiest motorway were completed today after three years of work.
A lorry driver has been arrested on suspicion of drink-driving following after reports of an articulated vehicle being driven erratically on the M25. The incident happaned on the westbound carriageway of the motorway at around 11.30am today.
A rolling roadblock was put in place behind the HGV by police just before junction 10 and it was brought to a stop at junction 13.
The man was arrested at the scene and remains in custody while Surrey Police investigate.
The Transport Secretary will consider whether roadworks on the M25 may have contributed to a spate of accidents on the same stretch of motorway which claimed the lives of two young women.
Patrick McLoughlin described the incidents that occurred between junctions 23 and 25 as "appalling" and said that he would be looking to have a "full investigation" to determine the cause of the accidents after a number of fatalities.
Conservative MP Nick de Bois, whose Enfield North constituency takes in the relevant junctions, raised the matter in the Commons today during Transport Questions.
Part of the clockwise carriageway of the M25 is still closed following this morning's crane fire. The Highways Agency says delays are minimal.
The Highways Agency says part of the M25 motorway is still partially closed after a crane caught fire near the crossing from Essex into Kent.
Two lanes were closed off during the rush hour. One lane still remains closed.
3 people have been injured and the M25 closed for most of the day, after a lorry over turned on the motorway.
The accident happened this morning between junctions 24 and 25 near Potters Bar. It seems the lorry crashed into the central reservation where the men were working.
2 of those injured are seriously ill, the driver has been arrested. Tonight there are still severe delays on the motorway. Richard Pallot reports.
Severe delays and road closed due to recovery work and serious acciden on the M25 anticlockwise between J25 and J24, congestion to J26 (Waltham Abbey). Tailbacks for four miles.
Clockwise is now partly open, but anticlockwise is expected to remain closed until 20:00. Delays of around two hours approaching the closure at J25.
DIVERSION: Via the A10, A406 North Circular Road and A1, following the hollow square symbol.
Police have arrested a man on suspicion of causing serious injury by dangerous driving after a lorry overturned on the M25 this morning.
Four people were injured - two seriously. Three of them were road workers who were on the motorway at the time.
Severe delays and two lanes closed due to accident investigation work on M25 clockwise between J23 (St Albans Road) and J24 (Potters Bar).
Lanes two and three (of three) remain closed.