Former Tesco boss wants to send power from Morocco to Great Britain using subsea cable

Dave Lewis says the near-constant stream of clean electricity could supply the grid as early as 2030

In the south-west of Morocco, a sprawl of wind and solar farms stretching across an area the size of Greater London could soon generate the green electricity powering more than 9m British homes.

This is the unflinching vision of Sir Dave Lewis, the former Tesco boss who is hoping to build the world's longest subsea power cable in order to harness north Africa's renewable energy sources and power Britain's clean energy agenda.