A paper was published yesterday by the think tank the Jimmy Reid Foundation and analyses data covering three decades. The paper was written by Margaret Cuthbert a leading economist.

It says: “First, by examining the performance of the different parts of the UK economy over the past 30 years, it shows how dysfunctional the UK economy has been.

“Second, by comparing Scotland and the UK with other economies, it shows that the UK and Scotland have not been performing well and that in dynamic terms, the economy has been steered in a wrong direction.”

A Yes Scotland spokesman said: “Ms Cuthbert’s report supports what Yes Scotland has been saying — that Scotland is one the wealthiest countries in the world, that it consistently outperforms the rest of the UK and that Westminster is not working for us.”