An impression of the tidal lagoon power generator that has been designed for Swansea Bay shows the wall that would be built if the government approved the project

A thousand high-value manufacturing jobs are set to be lost in the Midlands because of the government’s continuing failure to decide whether to support tidal lagoon marine power.

Two of GE’s British plants, at Rugby and at Stafford, had been designated to construct the underwater turbines and to provide the complex electrical power systems needed for the pioneering Swansea Bay tidal lagoon and similar marine energy projects around the coast of Britain.

However, with the Department of Business, Energy and Industrial Strategy showing no sign of making a decision on whether to go ahead with the £1.3 billion project in south Wales, it has emerged that the American industrial giant is likely to decide that the plants have little future in the British power market