Tunnels in the United Kingdom
Glasgow City Council page on the Clyde Tunnel and upgrade works glasgow residents roads
Clyde Tunnel
The ''Hold Your Breath'' project
HoldYourBreath - Imagining the Clyde Tunnel
Map of the crossing (Source: streetmap.co.uk)
Streetmap.co.uk- search results
Dartford River Crossing website
Highways Agency - The Dartford - Thurrock River Crossing
Details and opening times joe shakespeare
Harecastle Tunnel- Trent & Mersey Canal
The Brunel Engine House Museum, Rotherhithe
Brunel Engine House
"Brief history during the Snow era" , UCLA School of Public Health
BRIEF HISTORY DURING THE SNOW ERA
New Tyne Crossing info
New Tyne Crossing
The Tyne Tunnels Website info
The Tyne Tunnels
Williamson Tunnels Heritage Centre
Williamson Tunnels Heritage Centre
BBC: The Williamson Tunnels news england
BBC NEWS | England | The enigma of Liverpool's labyrinth
Friends of Williamson tunnels
Friends of Williamson's Tunnels
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Clyde Tunnel , Dartford Crossing , Harecastle Tunnel , Thames Tunnel , Tyne Tunnel , Williamson's tunnels , .
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