London Coal Duty Marker on Colney Heath, 20 Metres from Road, Opposite Cock Inn is a Grade II listed building in the St Albans local planning authority area, England. Marker.

London Coal Duty Marker on Colney Heath, 20 Metres from Road, Opposite Cock Inn

WRENN ID
shadowed-joist-raven
Grade
II
Local Planning Authority
St Albans
Constituency
St Albans MP: Daisy Cooper (LD)
Country
England
Type
Marker
OS grid reference
TL 205 058
Coordinates
51.73812, -0.25496
Source
Historic England listing

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

Description

The London coal duty marker located on Colney Heath was erected between 1861 and 1862 to indicate the limit of coal duty in the London areas. This cast iron post is painted white and features chamfered corners. The capital is adorned with roll mouldings, and the front face displays the City of London crest, although there are no other inscriptions. The marker was cast by Henry Grissell iron works at Regents Canal in London and is one of four such markers in the parish. It is situated 20 metres from the road, opposite the Cock Inn.

Local climate

London Coal Duty Marker on Colney Heath, 20 Metres from Road, Opposite Cock Inn sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 89% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 87% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 61% of listed buildings. Of these, 15 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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Nearby listed buildings

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  2. Barn on North Side of Farmyard at Colney Heath Farm Grade II 78 m
  3. Colney Heath Farmhouse and Attached Barn Grade II 90 m
  4. Mill at Mill House Grade II 382 m
  5. The Crooked Billet Public House Grade II 462 m
  6. Apsley Cottage Grade II 483 m
  7. 94, High Street Grade II 504 m
  8. 68, Roestock Lane Grade II 518 m
  9. London Coal Duty Marker on South East Side of Road at Southern Boundary of Parish Grade II 869 m
  10. Church of St Mark Grade II 954 m