Grand Union Canal Aylesbury Arm Bridge Number 2 (Dixons Gap Bridge) and Lock Number 6 Adjoining on East

The Grand Union Canal Aylesbury Arm Bridge Number 2, also known as Dixon's Gap Bridge, and the adjoining Lock Number 6, were built between 1811 and 1813 by engineer Henry Provis for the Grand Junction Canal Company. The bridge is constructed of red brick in English bond and features a lock made of plum brick with long granite edging stones, wooden gates, and cast iron domed bollards.

This narrow, hump-backed bridge carries Wingrave Road over the canal and has a skew arch with a round arch and a 9-inch arch ring. The battered side walls are topped by a narrow raised band at roadway level, and the parapet walls follow the curve of the hump. Square projecting end piers mark the outswept ends of the parapets, with the eastern parapet having been renewed in buff brick.

This structure is an early example of a skew bridge and has seen little alteration since the arm opened in 1815. The narrow lock accommodates a single narrowboat, with its lower end located close to the eastern side of the bridge. It features double gates at the lower end with gate paddles only, and a single gate at the upper end, which is hinged on the northern side of the lock. This end has ground paddles only, with the gear set on timber posts. Stone edging on the southern bank and brick on the northern bank extend about 8 meters to the east of the entrance. A dated cast iron hinge anchor plate marked '1851' at the western end is likely reused from another location.