The London/Buckinghamshire border - Heathrow Cargo Terminal
The London, Hillingdon/Spelthorne boundary continues westwards along Bedfont Road
The Duke of Northumberland's River flows eastwards along the line of the Perimeter Road
The Longford River River flows eastwards along the line of the Perimeter Road
Post to the west Stanwell
Post to the east Terminal Four
Sites on the Buckinghamshire, Spelthorne side of the boundary
48 Beresford House. Mid 18th of painted brick and sash windows with 19th glass .Listed
Stanwell Farmhouse. Late 18th and early 19th two storey house, roughcast. Listed.
Duke of Northumberland's River
This section was built during the reign of Henry VIII by John Gates after the dissolution of the Monastery at Syon. It was to augment the water supply to mills and allow new ones to be built, thus providing a source of revenue for the Duke of Northumberland. It takes water from the Colne and flows through this stretch alongside the Longford River. Both have been diverted in association with the construction of Terminal Five but skirts the western and southern perimeter of the airport.
The waterway was constructed in 1638 at the instigation of Charles I in order to increase the water supply to Hampton Court and allow water features to be developed. It had a variety of names - the New River, the King's River, the Queen's River, the Cardinal's River, the Hampton Court Cut, and the Hampton Court Canal. In this section it runs parallel with the Duke of Northumberland’s River.
Southern Perimeter Road
Cargo Terminal. Built in 1969 near the southern runway.