Henlaw Tunnel Circa 400 Yards South West of Tillmouth Park Hotel is a Grade II listed building in the Northumberland local planning authority area, England. First listed on 10 March 1988. A {} Tunnel.
Henlaw Tunnel Circa 400 Yards South West of Tillmouth Park Hotel
- WRENN ID
- stubborn-rubble-mint
- Grade
- II
- Local Planning Authority
- Northumberland
- Constituency
- North Northumberland MP: David Smith (Lab)
- Country
- England
- Date first listed
- 10 March 1988
- Type
- Tunnel
- Period
- {}
- OS grid reference
- NT 884 424
- Coordinates
- 55.6752, -2.18595
- Source
- Historic England listing
Description
Henlaw Tunnel, built around 1810 for Sir Francis Blake, is a tunnel located approximately 400 yards southwest of Tillmouth Park Hotel. The tunnel is constructed of ashlar and measures about 4 feet wide, 6 feet 6 inches high, and 100 feet long, with iron railings.
The north entry features a round arch with an arch ring and a triple keystone, while the south entry is similar but accessed by a flight of 10 steps that also has railings. Inside, the tunnel has a round vault, with the first 30 feet finished in ashlar and the remainder in rusticated ashlar.
This tunnel serves as one of the garden features of Tillmouth Park, appearing to be set within an artificial mound.
Local climate
Henlaw Tunnel Circa 400 Yards South West of Tillmouth Park Hotel receives an average of 840 mm of rain a year. This makes it wetter than 57% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 67% of listed buildings.
It experiences an average of 23 freeze-thaw cycles a year, fewer than 76% of listed buildings. Of these, 13 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.
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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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