Breakthrough on HS2’s second longest tunnel
- Geo Con
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- Jun 30, 2025
- 1 min read
HS2 has smashed through another major milestone with the completion of the 8.4-mile twin-bore Northolt Tunnel under west London.
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HS2 has smashed through another major milestone with the completion of the 8.4-mile twin-bore Northolt Tunnel under west London.
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