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Severn TunnelBBC
•73% Informative
The Severn Tunnel is the world's longest underwater tunnel, a structure that took 13 years to build by hand.
It is the deepest part of the UK 's 22,000 mile ( 35,000km ) rail network, and where the railway track is replaced more than any other because of the corrosive, saltwater atmosphere.
Engineers have blocked it for 16 days until 19 July to renew the submerged tunnel.
The Severn Tunnel was the longest underwater tunnel in the world until 1987 .
It was the quickest way you could cross the Severn estuary before the first Severn road bridge opened in 1966 .
The tunnel cut the journey time between Bristol and south Wales by about an hour .
Each programme of work takes five years to plan and starts as soon as previous cycle ends.
VR Score
71
Informative language
65
Neutral language
59
Article tone
informal
Language
English
Language complexity
38
Offensive language
not offensive
Hate speech
not hateful
Attention-grabbing headline
not detected
Known propaganda techniques
not detected
Time-value
medium-lived
External references
7
Source diversity
1
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