East Portal of Middlehill Tunnel is a Grade II* listed building in the Wiltshire local planning authority area, England. First listed on 24 July 1985. Railway tunnel.
East Portal of Middlehill Tunnel
- WRENN ID
- iron-outpost-hemlock
- Grade
- II*
- Local Planning Authority
- Wiltshire
- Constituency
- Melksham and Devizes MP: Brian Mathew (LD)
- Country
- England
- Date first listed
- 24 July 1985
- Type
- Railway tunnel
- Address
- East Portal of Middlehill Tunnel, Box
- OS grid reference
- ST 821 687
- Coordinates
- 51.41756, -2.25855
- Source
- Historic England listing
Description
The East Portal of Middlehill Tunnel is a railway tunnel entrance built in 1840 by I.K. Brunel for the Great Western Railway. It features ashlar stonework with some later brick refacing. The entrance has a classical archway made of ashlar, flanked by curving retaining walls that have been refaced in brick and end in circular piers. The main arch is rusticated and has a heavy moulded console keystone, set back between the piers, each of which has a recessed panel featuring massive fasces. There is an elemental Doric cornice that breaks forward over the piers, along with an ashlar parapet that has a moulded cornice. The design of this portal is identical to that of the West Portal.
Local climate
East Portal of Middlehill Tunnel receives an average of 850 mm of rain a year. This makes it wetter than 59% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 63% of listed buildings.
It experiences an average of 33 freeze-thaw cycles a year, fewer than 55% of listed buildings. Of these, 14 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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