The M20 will shut tonight as the Operation Brock contraflow is deployed ahead of a busy bank holiday weekend. The route will close between Maidstone and Ashford to allow the scheme to be implemented. It is being deployed on a 13-mile section of the motorway between Junction 8 for Leeds Castle and Junction 9 at Ashford. This is ahead of the Bank Holiday weekend due to the heavy volume of traffic expected. The M20 will be closed – London-bound from Junction 9 to 8 and coastbound Junction 7 to 9 – overnight from 8pm tonight to 6am tomorrow. National Highways says fully signed diversion routes wil…