Bollard on North Side of Round Tower is a Grade II listed building in the Portsmouth local planning authority area, England. First listed on 18 March 1999. Bollard.

Bollard on North Side of Round Tower

WRENN ID
tall-buttress-moss
Grade
II
Local Planning Authority
Portsmouth
Constituency
Portsmouth South MP: Stephen Morgan (Lab)
Country
England
Date first listed
18 March 1999
Type
Bollard
Address
Bollard on North Side of Round Tower, Tower Street, City of Portsmouth
OS grid reference
SZ 629 993
Coordinates
50.79069, -1.10874
Source
Historic England listing

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

Description

This structure is a bollard located on the north side of the Round Tower in Portsmouth, specifically on Tower Street at The Point. Originally a cannon barrel, it is engraved with the date 1708. The cannon barrel was repurposed as a bollard, likely in the mid to late 19th century. It is made of cast iron and features a tapering barrel that is set on end.

Local climate

Bollard on North Side of Round Tower 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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  • 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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  3. Seagull Restaurant Grade II 71 m
  4. Broad Street Post Office Grade II 76 m
  5. 23, Broad Street Grade II 90 m
  6. 14, Broad Street Grade II 98 m
  7. 10 and 12, Broad Street Grade II 105 m
  8. Bollard on South Side of Junction with Bathing Lane Grade II 112 m
  9. Two Bollards at North Side of Junction with Bathing Lane Grade II 116 m
  10. Quebec House Grade II 120 m