From
the Bailiwick ExpressBusinessman Martyn Dorey has been developing his proposals together with Danish experts Ramboll, who have previously advised on a 18km fixed immersed tunnel link across the Fehmarnbelt in Scandinavia and the Queensferry Crossing, which is the world's longest three-tower, cable-stayed bridge.
He turned to them for technical advice for what he regards as a groundbreaking project that would enable islanders to travel the 44km route between St Peter Port and St Helier in just 15 minutes, with a stop-off at Jersey Airport on the way.
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"We have 200,000 visitors a year and a high speed link would better enable Guernsey to tap into the 750,000 people who visit Jersey every year."
Ultimately, the success of a subsea train service in the Channel Islands would hinge on the speed - Mr Dorey is aiming for 15 minutes between St Peter Port and St Helier - and the price point, which he believes needs to be a maximum of £30 for a one-off booking and potentially as low as £10 for regulars.