There are long delays on the M25 after two lanes were closed.

Emergency roadworks are being carried out on the clockwise carriageway just after J30 (A13).

There is slow traffic back to J29 (A127).

Update: 4pm

There is 8.7 miles of congestion, with the lanes remaining closed.

It will take about an extra two hours to get past the roadworks, with queues now back to J28.

Update: 5.30pm

This is still causing long tailbacks to J29 (A127).

It is hoped the roadworks will be completed soon.

Update: 5.50pm

The closure has been removed and all lanes are now open.

There are delays of 135 minutes, with congestion back to J27.