Peel Energy claims power from a tidal barrage across the estuary of the Mersey could become competitive given enough time in the context of a 120-year lifespan.

But after conducting a feasibility study it says the UK’s marine renewables incentive regime would not help deliver a return quickly enough to tempt would-be investors, and has put the project on ice.

The Mersey barrage would have qualified for two UK renewables obligation certificates (ROCs), but Peel