Scotsman: THE head of the UK’s largest coal producer has said that a return to deep mining north of the Border is essential if the Scottish Government is to follow through on its commitment to coal-fired power stations. Don Nicolson, the new chief executive of the Scottish Resources Group, which owns several firms, including Scottish Coal, told The Scotsman that there are “perhaps billions of tonnes” of coal in Scotland that could not be accessed by surface mining. He said: “There are millions …