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
Prees Branch Canal Nature Reserve Canal (now the Llangollen Canal) to Prees, but was only constructed as far as Quina Brook. It is only navigable as far as a marina, beyond which the reserve is effectively a long pond and its banks. Prees Branch Canal Nature Reserve Prees Branch Canal Nature Reserve is a Shropshire Wildlife Trust nature reserve in the civil parish of Whixall, Shropshire, England. It is a Site of Special Scientific Interest due to the presence of rare pondweeds (Potamogeton), and also is the home of watervoles. Dragonflies and other invertebrates occur in the water, on the banks and in the air