Operation Brock Barrier Set to Roll on M20 Tonight
The moveable barrier system known as Operation Brock will be deployed on the M20 in Kent tonight (Monday 21 March) due to reduced ferry capacity at the Port of Dover. Kent Resilience Forum confirmed the decision today, aiming to keep traffic flowing smoothly amid the disruption.
Why Is Operation Brock Being Activated?
Though there is enough space to handle displaced P&O freight, the forum said activating Operation Brock is a precaution to minimise traffic chaos. The system is part of broader measures to keep Kent moving when cross-Channel services face disruption.
M20 Road Closures and Contraflow Details
- The M20 will close between junctions 8 and 9 from 8pm tonight to allow safe barrier setup.
- Both carriageways will reopen by 6am Tuesday 22 March, with a contraflow in place on the London-bound side.
- HGVs heading for Dover or Eurotunnel will queue on the coastbound carriageway if needed.
- Cars, motorbikes, and local freight must use the contraflow on the London-bound carriageway.
- Clear signage will direct all traffic accordingly.
- An overnight diversion route will be fully signed.
Operation Brock: The Nuts and Bolts
Operation Brock keeps the M20 flowing both ways during disruption by switching traffic onto a contraflow system. It’s a legal must for HGVs heading to the continent to follow the signed routes when Brock is active.
The barrier setup involves two specialist machines moving over 14,000 tonnes of concrete blocks and more than 8,000 traffic cones into place — all within a few hours.
For the latest updates and travel advice on Operation Brock, visit nationalhighways.co.uk/travel-updates/operation-brock/.
