THE Thelwall Viaduct will be closed overnight on Thursday.

Highways Agency engineers will close the three lane northbound contraflow on the new viaduct and the single northbound lane on the old viaduct between 9pm and 5am so the work can be carried out in safety.

Northbound traffic will be diverted off and back onto the M6 via the junction 21 slip-roads and roundabout during the closures.