Pictures have been released showing the behind the scenes work which resulted in the closure of the Pen-y-Clip tunnel on the A55.

The A55 tunnel, near Penmaenmawr, was closed off to traffic last night while workers did maintenance work on the stretch of road.

Traffic Wales, on their North and Mid Wales Twitter this morning, posted: "If you were wondering why the #A55 #PenYClipTunnel was closed yesterday evening – here are some pictures of some of the repairs."