Operation Brock activated as M20 closes overnight ahead of summer getaway

The M20 was closed overnight between Maidstone and Ashford as National Highways activated Operation Brock in preparation for increased cross-Channel traffic during the peak summer holiday period.

The overnight closure enabled engineers to install the 13-mile contraflow system between junction 8 (Maidstone) and junction 9 (Ashford), following a request from the Kent & Medway Resilience Forum.

Operation Brock has been introduced ahead of an anticipated rise in passenger and freight traffic travelling through the Port of Dover and Eurotunnel, helping to manage congestion and keep traffic moving across Kent should disruption occur at the Channel crossings.

Overnight operation completed

The motorway was closed in both directions overnight to allow specialist teams to safely install the movable barrier system that separates freight traffic from other vehicles.

With the installation now complete, the Brock traffic management system is operational and will remain in place throughout the busy summer travel period.

National Highways said carrying out the work overnight helped minimise disruption while allowing crews to safely deploy the extensive contraflow arrangement.

How Operation Brock works

Operation Brock is designed to maintain traffic flow on the M20 during periods of disruption affecting Channel ports.

Under the system, heavy goods vehicles travelling to the Port of Dover or Eurotunnel are directed into dedicated sections of the motorway, while other traffic—including cars and local freight—uses a contraflow running on the opposite carriageway.

The arrangement helps reduce congestion on local roads while maintaining access for residents, businesses and holidaymakers.

Drivers urged to follow motorway signs

With the contraflow now in operation, National Highways is reminding motorists to follow the temporary road signs rather than satellite navigation systems when travelling through the area.

Freight operators heading for the Port of Dover or Eurotunnel are required to join Operation Brock at M20 junction 8, while other coastbound traffic should follow signed routes into the contraflow system.

Preparing for summer travel

The activation of Operation Brock reflects expectations of increased demand as schools break up for the summer and holiday traffic begins to build across Kent's strategic road network.

National Highways is encouraging drivers travelling to the continent to prepare their vehicles before setting off by remembering its TRIP guidance:

• Top-up fuel, oil and screen wash.

• Rest by planning breaks at least every two hours.

• Inspect tyres for pressure and tread depth.

• Prepare for changing weather and traffic conditions.

The deployment of Operation Brock is intended to improve network resilience during one of the busiest travel periods of the year, helping to minimise disruption while maintaining access to the UK's busiest international ferry and rail terminals.