Boston Manor Park Urban District Council. Some land was developed as housing and the park was opened to the public on 11 September 1924. Comprising an area of surrounding the manor house, the park is accessed from Boston Manor Road on the eastern perimeter. The construction of the M4 motorway in 1964-5 was the biggest alteration to the park landscape, dissecting the park from north-west to south-east perimeters. The Grand Union Canal and River Brent run along the western perimeter, the canal taking in what is now known as Clitheroes or Clitheroe's Lock 99. The canalside is a designated Nature Conservation Area. Notable
Thelwall Viaduct Thelwall Viaduct The Thelwall Viaduct () is a steel composite girder viaduct in Lymm, Warrington, England. It carries the M6 motorway across the Manchester Ship Canal and the River Mersey. Its location on the motorway network is between junctions 20 and 21 of the M6, the former being also known as junction 9 of the M56. It actually comprises two entirely separate bridges, one of 4,414 feet long carrying the northbound carriageway, which was the longest motorway bridge in England when it was opened in July 1963, and one 4,500 feet long carrying the southbound carriageway which was opened in