Please see the following link to the Highways England announcement Friday 22nd March (https://www.gov.uk/government/news/operation-brock-ready-for-action) that Operation Brock will be in place by 6.00am on Monday 25th March. The announcement states:
From Monday (25 March) the M20 contraflow will be in effect from north of Junction 8 (for Maidstone) to Junction 9 at Ashford. Lorries heading for mainland Europe will be routed down the coastbound carriageway, with a 30mph speed limit in place. All other traffic will be directed onto the London-bound carriageway, with two lanes in each direction operating at 50mph. The deployment will help to demonstrate Kent’s preparedness for disruption and allow the contraflow to be in place for any traffic disruption in the coming weeks. Three lanes in each direction could be restored, with a 50mph limit, if Operation Brock is assessed as unlikely to be required in the following weeks.
Drivers are advised that sections of the M20 will be closed this weekend for the final work to take place, signed diversions will be in place. From Monday drivers will need to follow the different layout on the M20 from just north of Junction 8 (for Leeds) to Junction 9 (Ashford).
Please see the full Highways England announcement for further details. The KM Online has already covered the Highways England announcement – see https://www.kentonline.co.uk/kent/news/drivers-face-m20-contraflow-next-week-as-no-deal-brexit-looms-201262/.