1 May 2005: you’d need awfully big jars… We’re exploring the Welsh border country near Chirk, ending up beside the Llangollen canal. Heading south, the canal passes though a short tunnel and enters a basin. Its purpose (I’m guessing) is to regulate traffic between the tunnel and the aqueduct which follows, beside the railway viaduct and  high above the river Ceiriog. It only takes one little boat coming the other way to cause chaos!