Once this has been done, three more assessments will take place.

An economic analysis will look at how much money a scheme could generate against the construction and operating costs.

Each scheme will also be evaluated for its environmental impact, as the river is recognised across the globe for its ecological richness and diversity.

The possible effects on the shipping industry will also be looked at. Peel is now asking anyone who may have relevant information to come forward so that it can be considered as part of the study.

“Throughout the course of the process, in the run-up to a planning application, the project team will engage extensively with everyone that has a stake in the project,” said Mr Hatton.

“We will be totally open about the different options under consideration and will seek to stimulate a discussion that includes local authorities and organisations and especially the people who live in the areas surrounding the possible sites.

“Comments and feedback on any aspect of the project will be welcome at any time and we will do our best to answer questions, explain the issues and deal with any concerns that are raised. At this stage we are specifically asking for any additional information on relevant technologies or reference information that will assist with the study.”

The study is being led by consultants Scott Wilson, Drivers Jonas and EDF on behalf of Peel and the North West Development Agency.

Steven Broomhead, NWDA chief executive, said the scheme could provide national benefits.