M20 Operation Brock contraflow

We're deploying the contraflow on the M20 between junctions 8 Maidstone and 9 Ashford ahead of the Christmas holiday period.

This is due to expected high passenger numbers at the Kent ports.

Operation Brock is part of a series of measures to make sure traffic flows smoothly when cross-channel services are disrupted.

To install the contraflow, we'll close the the M20 overnight from 8pm Monday 15 December to 6am Tuesday 16 December 2025:

• London bound from junction 9 to 8
• coastbound junction 7 to 9

Fully signed diversion routes will be in place during the closure. Please follow diversion signs, not SatNav instructions.

While the contraflow is active

When the M20 reopens, the Brock contraflow will be active and you should follow all signs.

HGVs heading for the Port of Dover or Eurotunnel

Once the barrier is in place, you must follow the signs to join Operation Brock at M20 junction 8.

All other coast bound traffic – including local freight and car drivers heading for the continent

Follow the signs and crossover to enter the contraflow on the M20 London bound carriageway.

Plan ahead

If you're travelling over the holiday period, allow more time for your journey and make sure you're prepared for delays.

Follow our driving advice and have a safe T.R.I.P this winter.

Be prepared for driving in bad weather.

Use this link to check the status of the Operation Brock contraflow.