Richard Murphy is an economist. He runs the blog Tax Research UK where he is described as:
Richard Murphy (60) is a chartered accountant and a political economist. He has been described by the Guardian newspaper as an “anti-poverty campaigner and tax expert”. He is Professor of Practice in International Political Economy at City University, London and Director of Tax Research UK. According to International Tax Review Richard was the 7th most influential person in global tax in 2013. In 2016 Richard was in the same journal’s Global Top 50 in tax, one of only two people to have been so for the whole five years it had published such a list. In 2017 he was ninth on the same list.
And he’s a supporter of Scottish Independence. Here are a couple of videos where he talks about how Scotland will do economically as an independent nation.