Motorists are braced for more Bank Holiday misery as the Operation Brock contraflow is set to be deployed again. The M20 will be closed overnight between Maidstone and Ashford next Wednesday (May 22) 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 next Wednesday to 6am on Thursday. Nationa…