BIG guns were wheeled out yesterday in the battle over independence: their ammunition – oil and taxes. It is a battle that has been building for 21 years, ever since two Scots, then aged 33 and 32, entered the House of Commons as young and inexperienced MPs on the same day in June 1987. Yesterday, they clashed, not just as Scottish MPs from rival parties but as politicians at the height of their powers. for more click here