[stuartcw]

Err.. no. It is generally considered unwise to consider boring sea tunnels along the boundaries of tectonic plates in the Ring of Fire especially considering the distance from Taipei to Naha is 641km, 30 times longer than the current record holding sea tunnel between the Hokkaido and the main land.

Also note Ireland-Britain has no tunnel.

[mrlonglong]

There could be if Boris Johnson gets his way. But I rather suspect the Treasury won't let it happen. They are notorious skinflints.