A busy tunnel has been closed as road bosses prepare for significant traffic heading towards ferry terminals. The A20 Roundhill Tunnel is closed eastbound between the M20 J13 (A259/A2034) and the A260 near Folkestone. This closure has been put in place by officials to prevent traffic queueing inside the tunnel following the implementation of Operation TAP for the Port of Dover. Road users are advised to follow the hollow black circle diversion symbol on road signs. Drivers should exit M20 at J13 and go onto the A259 Churchill Avenue, travel east to the A260 Canterbury Road roundabout, take the…