West Portal and Islington Tunnel (Regents Canal) is a Grade II listed building in the Islington local planning authority area, England. First listed on 12 October 1978. Portal and tunnel.

West Portal and Islington Tunnel (Regents Canal)

WRENN ID
hallowed-tracery-lichen
Grade
II
Local Planning Authority
Islington
Constituency
Islington South and Finsbury MP: Emily Thornberry (Lab)
Country
England
Date first listed
12 October 1978
Type
Portal and tunnel
Address
West Portal and Islington Tunnel (Regents Canal), Muriel Street
OS grid reference
TQ 308 834
Coordinates
51.5348, -0.115
Source
Historic England listing

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

Description

The West Portal and Islington Tunnel, part of the Regents Canal, was built in 1820 by John Nash. It features red stock brick set in English bond, accented with gold stock brick and stone dressings. The portal has an elliptical opening with a keystone, surrounded by radiating rusticated brick voussoir blocks and stone cheeks. It is flanked by brick pilasters that have stone bases and caps, which support remnants of a brick parapet. Inside the tunnel, the walls are barrel vaulted with brick and lined with plaster.

Local climate

West Portal and Islington Tunnel (Regents Canal) sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 95% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 57% 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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