The Union Stone is a Grade II listed building in the Northumberland local planning authority area, England. First listed on 25 August 1987. Boundary stone.

The Union Stone

WRENN ID
white-joist-bone
Grade
II
Local Planning Authority
Northumberland
Constituency
North Northumberland MP: David Smith (Lab)
Country
England
Date first listed
25 August 1987
Type
Boundary stone
Address
The Union Stone, Edlingham
OS grid reference
NU 138 085
Coordinates
55.37099, -1.78237
Source
Historic England listing

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

Description

The Union Stone is a boundary stone, likely from the 18th century, made of sandstone. It has a rectangular shape with a roughly segmental top. On the east side, it features incised letters "A" for the Freemen of Alnwick, "N" for the Duke of Northumberland on the south side, and "S" for Swinburne on the west side. This stone marks the junction of the parishes of Alnwick to the east, Denwick to the south, and Edlingham to the west.

Local climate

The Union Stone receives an average of 810 mm of rain a year. This makes it wetter than 50% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 85% of listed buildings.

It experiences an average of 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 16 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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  • 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

  1. 3 Boundary Stones on Boundary with Denwick (Detached) Civil Parish Grade II 133 m
  2. 2 Boundary Stones on Boundary with Alnwick Civil Parish Grade II 402 m
  3. 3 Boundary Stones to North of Black Lough Grade II 562 m
  4. 2 Boundary Stones on Boundary with Alnwick Civil Parish Grade II 676 m
  5. 10 Boundary Stones on Parish Boundary with Denwick (Detached) Civil Parish Grade II 750 m
  6. Freeman's Hill Farmhouse Grade II 1.3 km
  7. 8 Boundary Stones on Boundary with Alnwick Civil Parish Grade II 1.4 km
  8. 10 Boundary Stones on Boundary with Alnwick Civil Parish Grade II 2.1 km
  9. Bigges Pillar Grade II 2.2 km
  10. Edlingham Castle Ruins Grade I 2.4 km