- Shetland undersea tunnel cost estimated at £402m BBC
- Tunnels shown to be cheaper than even the most basic ferry model once operational costs are factored in over 60 years Shetland Times
- Constructing tunnel to Yell could require budget of £400m, estimates suggest Shetland News
- Tunnel between two Scottish islands ‘could cost more than £400m’ The Herald
- Undersea Shetland tunnel estimated to cost £402 million The National Scot
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