Salmond, who fears he cannot win a straight independence referendum, would like to ask another question on whether Scotland should have greater devolution that falls short of full independence.

Asked whether his government would put only a yes/no question on the ballot paper, as Cameron wanted, Salmond said the legitimate view of people who wanted greater devolution should not be ruled out at this stage.

He hopes that greater devolution of powers and control of finances to Cornwall would aid in the development of green and other innovative technologies by Cornish companies.

Even then the SNP would maintain its cautious approach by offering voters the chance of supporting "devo max" - greater devolution that just falls short of independence.

The research recommends greater devolution of powers over planning, transport and skills to our big cities to enable them make the big infrastructure investments crucial to driving economic development.

Once elected, they would negotiate for greater devolution.

OK, these things take time and Mr Cameron's commitment to greater devolution certainly seems more genuine than anything we have heard for years.

He also seems to have favoured greater devolution to Scotland itself, attending meetings of the Scottish Home Rule Association.

When polls give three options, including an option for greater devolution but stopping short of independence, support for full independence is much lower.

We Welsh voted last year for greater devolution, that is the best way on this tiny island.