Operation Brock

The Operation Brock contraflow system is designed to keep traffic on the M20 and other roads in Kent moving when there is disruption to travel across the English Channel

Operation Brock

Status of Operation Brock


We'll use these alerts at the top of this page to tell you the status of Operation Brock:

Further advice and information for travelling on the M20

Operation Brock is currently in place and its deployment is being reviewed on a weekly basis.

With cross channel capacity still down by a third following the suspension of P&O services, keeping Operation Brock in place will help keep Kent moving and safely manage HGVs travelling from the UK to the continent.

Keeping Operation Brock in place will also help with changes in demand at either the Port of Dover or Eurotunnel. Both are reporting strong demand for freight and passenger traffic in the weeks ahead. 

Those travelling in, to or through Kent in the weeks ahead are reminded to check before they travel, allow more time for their journeys and make sure they have essential supplies with them, including something to eat and drink and medicines.

HGV drivers are reminded that when Operation Brock is in place they must use the M20, not the M2 or A2, join Operation Brock at junction 8 of the M20 and follow all signs and instructions. Failure to do so could cost significant time, money and fuel, as well as a potential fine of £300.

Planning to take the M20?

Operation Brock is currently operating in free flow for port bound HGV traffic, with the M20 contraflow open in both directions to all other traffic. Operation TAP, approaching the Port of Dover, has been in use periodically but is not delaying HGVs or other traffic.

Drivers are urged to check the latest traffic website via website (www.trafficengland.com),

What is Operation Brock and why is it in use?

When there’s any sort of disruption in the channel, HGV traffic on the M20 heading for the Port of Dover or the Eurotunnel has nowhere to go.

Brock is part of a series of measures to improve Kent’s resilience in the event of disruption to services across the English Channel.

It is being used now because there continues to be disruption at the Port of Dover caused by a reduced number of ferries and high volumes of traffic.

How can I find out if my local journey is being affected?

Further information is available from National Highways by visiting our www.trafficengland.com website and travel apps, or follow @HighwaysSEAST, @KentPoliceRoads and @KentHighways on Twitter. 

The National Highways 24/7 contact centre team is also available to provide up to the minute information on 0300 123 5000




From time to time, we'll need to close the M20 to maintain the moveable concrete barrier.

You can find out more about routine closures on our Travel Alerts page or by following our regional Twitter feed.


Sign up for updates

Keep updated on Operation Brock. Receive email bulletins when we update this page.

Subscribe to this page