Locks 1 and 2 Grand Union Canal Aylesbury Arm is a Grade II listed building in the Buckinghamshire local planning authority area, England. First listed on 15 October 1984. Lock.

Locks 1 and 2 Grand Union Canal Aylesbury Arm

WRENN ID
silent-courtyard-starling
Grade
II
Local Planning Authority
Buckinghamshire
Constituency
Aylesbury MP: Laura Kyrke-Smith (Lab)
Country
England
Date first listed
15 October 1984
Type
Lock
Address
Locks 1 and 2 Grand Union Canal Aylesbury Arm, Marsworth
OS grid reference
SP 917 144
Coordinates
51.82073, -0.67068
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Locks 1 and 2 on the Grand Union Canal Aylesbury Arm are a narrow double lock built between 1811 and 1814. They feature brick retaining walls, with the lower lock having brick coping and the upper lock having stone coping. On the north side, there are two flights of brick steps. The eastern end of the upper lock includes a single gate with a sluice, winding gear, and quoins that are dated 1878. There are also two additional pairs of narrow gates with sluices, with the central gates having quoins dated 18??6. The site is marked by five cast iron bollards.

Local climate

Locks 1 and 2 Grand Union Canal Aylesbury Arm sits in a drier-than-average part of the UK, with an average of 740 mm of rain a year. This makes it drier than 76% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 81% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 69% of listed buildings. Of these, 17 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Detailed attributes — period, style, materials, features
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  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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  1. Canal House Grand Union Canal Aylesbury Arm Grade II 28 m
  2. Bridge Number 1 Grand Union Canal Aylesbury Arm Grade II 32 m
  3. The Old Manor Grade II 238 m
  4. Horseshoe Cottage Grade II 273 m
  5. Lock Number 4 Grade II 315 m
  6. Lychgate Grade II 333 m
  7. Church of All Saints Grade II* 338 m
  8. Bridge Number 132 Grand Union Canal Grade II 354 m
  9. Marsworth War Memorial Grade II 355 m
  10. Farmhouse at Startop Farm Grade II 363 m