Llangollen Canal an Act of Abandonment in 1944, allowing it to close of canals, including much of the Shropshire Union system. However, the line from Hurleston to Llangollen and onwards to Llantisilio was saved, as it was the main supply of water to the rest of the system. On 6 September 1945, due to inadequate maintenance, the canal breached its banks east of Llangollen near Sun Bank Halt. The flow of hundreds of tons of water washed away the embankment of the railway further down the hill, creating a crater which was long and deep. This caused the first traffic of the
Trent and Mersey Canal and two smaller tunnels at Saltersford (since 2008 also one-way operation, alternating each half-hour), and Barnton to the "junction" with the River Weaver at Anderton Boat Lift near Northwich. After Anderton, the next major destination is Middlewich, where a junction with the 50 yard long Wardle Canal leads to the Middlewich Branch of the Shropshire Union Canal which gives access to Chester, Llangollen and (south on the 'Shroppie') a parallel route to Birmingham/Wolverhampton. South of Middlewich, having passed through Wheelock, the T & M climbs out of the Cheshire Plain via the 'Heartbreak Hill' locks (more traditionally known as the