Shropshire Union Canal links are to the Llangollen Canal (at Hurleston Junction), the Middlewich Branch (at Barbridge Junction), which itself connects via the Wardle Canal with the Trent and Mersey Canal, and the River Dee (in Chester). With two connections to the Trent and Mersey (via the Middlewich Branch and the Staffordshire and Worcestershire Canal) the SU is part of an important circular and rural holiday route called the Four Counties Ring. The SU main line was the last trunk narrow canal route to be built in England. It was not completed until 1835 and was the last major civil engineering accomplishment of
Llangollen Canal later that year. By 1954, the Llangollen Canal was in a curious position. Under the terms of the LMSR Act of abandonment, obtained in 1944, navigation had been abandoned, but the right to sell water had been retained. This was to be for a period of ten years, during which those who bought the water were required to make alternative arrangements, which they failed to do. Since the nationalisation of the canals in 1948, the canal had been managed by the British Transport Commission, who had to obtain Parliamentary approval to extend this arrangement. Meanwhile, a number of pleasure boats