The trial, along with a previously announced urban equivalent in Leicester, will depend on small-scale production of the vehicles.

BBC: Hugo Spowers with hydrogen-powered car

Now, rural regeneration agency Cadwyn Clwyd has launched a project to revive small-scale hydro-electric power production in rural Denbighshire, launching feasibility studies for using water power on the Dee at Llangollen, and on the Alyn at Llandegla and Loggerheads.

BBC: Rossett Mill is an historic landmark in the town