For Alec Priest, an instrument technician at Sullom Voe oil terminal on Shetland, the case for digging tunnels under the narrow stretches of ocean that separate his home from work is clear-cut.
As things stand, two ageing ferries crossing tidal sounds notorious for their powerful currents break up his commute. For a casual tourist, that adds to the mystique. For time-pressed islanders, care workers and businesses, it adds delays, stress and costs.
