Cannon Bollard, Fort Blockhouse is a Grade II listed building in the Gosport local planning authority area, England. First listed on 13 November 2020. Cannon. 1 related planning application.

Cannon Bollard, Fort Blockhouse

WRENN ID
small-foundation-jet
Grade
II
Local Planning Authority
Gosport
Constituency
Gosport MP: Dame Caroline Dinenage (Con)
Country
England
Date first listed
13 November 2020
Type
Cannon
Address
Cannon Bollard, Fort Blockhouse, Haslar Road, PO12 2AB
OS grid reference
SZ 624 991
Coordinates
50.78818, -1.11483
Source
Historic England listing

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

Description

The Cannon Bollard at Fort Blockhouse is a cannon, likely cast in the early 19th century, that has been turned upright to serve as a bollard near the entrance. The cannon is positioned with the barrel facing upwards and its breech set into a concrete pavement, leaving only about half of its length visible. The trunnions, which are the pivots on the side of the barrel, are not visible. The cannon features a tapering barrel with visible muzzle mouldings, an astragal, and a second reinforce ring. The barrel flares out at the mouth, creating a muzzle swell, and the bore is fitted with a stopper.

Local climate

Cannon Bollard, Fort Blockhouse receives an average of 810 mm of rain a year. This makes it drier than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.

It experiences an average of 19 freeze-thaw cycles a year, fewer than 79% of listed buildings. Of these, 8 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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  • No EPC on record for this property
  • No sale records on file
  • Related listed building consents — 1 application
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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