Despite having imposed deep spending cuts last month, the coalition government has repeatedly reaffirmed its commitment to meeting the UK's 2020 renewables targets, as well its intention to utilise renewables as an economic springboard.

In addition to its leading position in offshore wind, the UK is at the forefront of the wave- and tidal-energy sector, with a world-beating 2.4MW of grid-connected capacity in the water, and a 2020 target of 700MW for the Pentland Firth alone.

But