A further three junctions of the M20 are set to be shut as traffic officials struggle to contain cross-Channel chaos.

The coastbound carriageway of the motorway is set to be closed up to Junction 11 as operation 'Brock Zero' is brought in.

Brock Zero is the name given to the operation which sees the head of the queue moved from just before Junction 9, near Ashford, down to Junction 11, near Hythe.

It means a total of four junctions – not including junction 11 – are closed.

Under the operation, the suggested diversion takes drivers off the motorway at Junction 8 as before, down the A20 and on to the B2229.

They then have to navigate to the A2042 andA2070 before getting to the A20, eventually rejoining the motorway at Junction 11.

A National Highway spokesperson said: "Due to continued disruption at the Port of Dover caused by a reduced number of ferries, poor weather and high volumes of traffic, the Kent Resilience Forum (KRF) has this afternoon agreed to implement additional traffic management measures alongside Operation Brock.

"These include moving the front of the Operation Brock queue to just before junction 11 on the M20. This will allow port-bound HGVS to remain on the M20.

"All other coastbound traffic will be diverted off the M20 and on to the A20, the A28, B2229, A2042, A2070 and back onto the A20 to re-join the M20 at junction 11.

"These additional measures will be introduced immediately and will result in longer journeys but will help keep traffic moving."

A spokesman also confirmed on social media that members of the KRE are considering bringing in portaloos within Operation Brock.

Highways England, Kent County Council and Kent Police are all discussing the need for the toilets, with the possibility of Brock staying in place for an extended period of time looking increasingly likely.

The diversion for all light vehicles such as cars (including tourist traffic bound for Eurotunnel and Port of Dover) and HGVs under 15'6 for local destinations is:

• Exit the M20 at J8 and take the third exit at the roundabout and at the next roundabout take the first exit on to the A20
• Remain on the A20 to Ashford and at the Drovers Roundabout take the second exit on to the A28
• At the junction with the B2229 turn right and continue to the junction with the A2042
• Turn left on to the A2042 and head east on to the A292
• Remain on the A292 to the Lacton Interchange roundabout and take the third exit on to the A2070
• Follow the A2070 to the next roundabout and then take the first exit to remain on the A2070 to the M20 J10 roundabout
• Take the third exit on to the A20 and remain on the A20 to re-join the M20 at junction 11