A tech entrepreneur bought a ruined Welsh island fort for £500,000, but after £2 million and a decade of work it became an 8,000-sq-ft off-grid home

• At the time, the island had no electricity or running water and the fort had been left in a derelict condition after earlier attempts to revive it as a hotel failed.
• Conner, the former chief executive of software company Appsbroker, subsequently embarked