Llangollen Canal part of the London Midland and Scottish Railway soon afterwards. After the takeover by the London Midland and Scottish Railway, regular maintenance was often not carried out, and gradually the canals silted up, so that boats could not operate with full loads. Traffic declined, and was significantly affected by a breach that occurred at the Perry Aqueduct, about to the south of Frankton locks, which effectively closed the Montgomeryshire Canal to all traffic. Traffic beyond Frankton to Llangollen had ceased in 1937, and the Frankton to Hurleston section was not used after 1939. The London Midland and Scottish Railway obtained
Llangollen Canal is now operated by United Utilities, and was given a £6 million upgrade in 2003. Just beyond the A534 Wrexham Road bridge is the entrance to Swanley Bridge Marina, on the west bank of the canal. It has moorings for over 300 boats, and is situated in of farmland, which includes a wood with nature trails. It opened in September 2006, and was built in response to a document published by British Waterways in the spring of that year, which outlined development opportunities for farmers and landowners adjacent to the canal. The two Swanley locks raise the level of the