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 appeal against closure, and gave the first hints that such canals could be retained because of their social value for recreation. Hugh McKnight, the editor of the Inland Waterways Association's "Bulletin", wrote an optimistic report in 1966, pointing to the achievements of the first 20 years of the organisation's existence, mentioning the changes in public opinion concerning the canals, and pointing particularly to the growth in leisure use on the Llangollen Canal and the Oxford Canal. Official attitudes changed, and the provisions of the Transport Act 1968 placed the canals under the control of the British Waterways Board, who were