Drivers are being warned of delays up to 30 minutes after a police incident within a tunnel at the Dartford Crossing.

The left tunnel at the Dartford Crossing northbound between junction 1A and junction 31 on the M25 had been temporarily closed due to an ongoing police incident within the tunnel, according to National Highways.

Drivers have been told to allow extra time as the temporary closure has caused delays of 30 minutes to normal journey times between junction 3 on the M25 and the tunnels.

The incident has been cleared and both lanes are open again but delays remain.

According to AA there is still stop-start traffic on the M25 near the Dartford Tunnel due to reports earlier of people on the road.

More to follow.