How quickly could the channel tunnel between England and France be made impassable if an invasion was threatened? - Quora
![290+ Channel Tunnel Stock Photos, Pictures & Royalty-Free Images - iStock | The channel tunnel, English channel tunnel, Channel tunnel train 290+ Channel Tunnel Stock Photos, Pictures & Royalty-Free Images - iStock | The channel tunnel, English channel tunnel, Channel tunnel train](https://media.istockphoto.com/id/1711321747/vector/map-of-the-channel-tunnel.jpg?s=612x612&w=0&k=20&c=3qeIxssHL5UVDsuFLGOWMQKRu0oMgdyH-9s8tV8mJL4=)
290+ Channel Tunnel Stock Photos, Pictures & Royalty-Free Images - iStock | The channel tunnel, English channel tunnel, Channel tunnel train
![Channel Tunnel remains OPEN despite France battling 'extremely high surge' in coronavirus cases | Daily Mail Online Channel Tunnel remains OPEN despite France battling 'extremely high surge' in coronavirus cases | Daily Mail Online](https://i.dailymail.co.uk/1s/2020/03/28/19/26531424-0-image-a-21_1585424128636.jpg)
Channel Tunnel remains OPEN despite France battling 'extremely high surge' in coronavirus cases | Daily Mail Online
![Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel](https://www.americangeosciences.org/static/earth/benchmarks-february-12-1986-france-and-uk-sign-treaty-canterbury-paving-way-chunnel/Cantner_ChunnelCrossSection.jpg)
Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel
![EU-UK relations: MEPs approve rules to ensure Eurotunnel safety and cooperation | Novice | Evropski parlament EU-UK relations: MEPs approve rules to ensure Eurotunnel safety and cooperation | Novice | Evropski parlament](https://www.europarl.europa.eu/resources/library/images/20201007PHT88714/20201007PHT88714_original.jpg)
EU-UK relations: MEPs approve rules to ensure Eurotunnel safety and cooperation | Novice | Evropski parlament
![Channel Tunnel, the longest undersea tunnel in the world, reaches a technological grid milestone with GE | GE News Channel Tunnel, the longest undersea tunnel in the world, reaches a technological grid milestone with GE | GE News](https://www.ge.com/news/sites/default/files/2023-02/ge_getlink_eurotunnel_infographic_en_2023.png)