- M4 was closed through the morning from J11 to J10
- A pedestrian has died following a collision with a lorry about 03:00 BST
- Delays continued in to the afternoon
- Police have appealed for witnesses
- Updates from Tuesday 11 October 2016
A spokesperson from Iceland has released a statement following the fatal crash on the M4 earlier.
“We can confirm that an Iceland vehicle was involved in an incident on the M4 in the early hours of this morning which led to a fatality.
"Our thoughts are naturally with the family of the deceased at this very sad time and also with our driver.
"We are unable to comment further until the police have completed their investigation into the incident.”
Insp Andy Storey from Thames Valley Police has asked anyone driving on the M4 near junction 11 at the time of the crash to get in touch.
He said: "We are trying to determine the circumstances which led to a pedestrian being on the motorway.
"In addition there are ongoing enquiries to identify the pedestrian at this time."
The Highways Agency has confirmed all lanes of the M4 are now open.
Thames Valley Police has said it expects the roads to remain "heavily congested" for some time.
Highways England has said the westbound lane of the M4 (J10-J11) is in the process of reopening.Copyright: BBC
The agency hopes to open the London-bound section of the M4 (J11-10) before 11:00.
However, it will take time for the traffic congestion to clear.
- Quote Message: I left home in Goring at 5.55 and meant to be at school to teach children an hour ago!! Finally made it to work! Very pleased as 7 months pregnant and in need of a comfort break! 2 hours Purley to Maidenhead. from KateQuote Message: I've left the car behind and decided to walk the 4.5 miles to work in Threee Mile Cross. My brother is currently stuck in traffic in Beech Hill also trying to get to Three Mile Cross. He's moved 0.5 miles in 25 minutes. I'm going to race him the rest of the way! from Secret VictoriaQuote Message: Left Medway, Kent at 5:30, sat on M4 4hrs journey to Cirencester for a training course!! Need coffee. from FrancescaQuote Message: It's taken me an hour so far to try and get from Arborfield to Winnersh Triangle. Been via Arborfield Garrison, Barkham, Wokingham and Woosehill. Almost there! from Rich
BBC Berkshire travel presenter
In case you are heading north today, there are major delays on the M4 and across Berkshire after a fatal collision at 03:00 BST.
- M4 closed London-bound J11 to J10
- M4 westbound outside lane closed from J10 to J11, delays back past J8/9
- A33 northbound to J11 queuing back to Riseley
- A4 Bath Road at a standstill from M4 J12 into Reading
- M3 also stop-start from J7 up to J2 for M25
- Best bet for London-bound traffic is J13, A34 north and M40
Some drivers diverting to avoid the London-bound closure on the M4 past Reading are using the M3 this morning, causing heavier than usual conditions in Hampshire.
Delays across Reading as people use the town for a diversion. Passengers have been calling BBC Radio Berkshire with updates on their journeys.Quote Message: It's bad, what ever you try and do to get in to Reading at the moment. I'm trying all the shortcuts I know. I've lived here for 35 years and never ever seen it as bad as this. from Richard Coles
A local diversion is available for road users intending on using the closed section of motorway (M4 J11 to J10 London bound).
Exit at J11 and follow the route marked with a hollow circle symbol on local road signs.
This will take traffic via the B3270 to Winnersh, then on to the A329 briefly to join the A329(M) southbound back to the M4 J10.
Road users from further afield heading towards London and destinations in the South East may wish to exit the M4 at J13 and travel north on the A34 to J9 of the M40 and head south to reach the M25.
Please note the diversion route uses single carriageway roads. Road users intending on using the diversion around the closure are advised the allow additional time to complete their journey.
Following the fatal collision this morning, callers have been telling BBC Radio Berkshire what they can see as they pass the scene.Quote Message: There's about 50 meters of green barriers along the central reservation... there were police and traffic officers in the cab [of the lorry] doing a quick inspection. from Nina Mercer
BBC Berkshire travel presenter
- Accident at 03:00 this morning closed M4 J11 to J10 London bound
- West bound outside lane closed from J10 to J11
- Long delays west bound tailing back to J8/9
- A33 north-bound towards J11 and Reading queuing to Riseley
- Traffic coming off at J12 onto A4 Bath Road means queues into Reading
- Best advice for London bound traffic is J13 up A34 and across to M40