Guardian: With the decision to approve plans for a third runway at Heathrow, Gordon Brown has managed to unify Britain and made the Tory party look quite modern. Apart from a few large concrete manufacturers, and the business and aviation lobby groups whipped in by government to support the cause, it was hard to find anyone today who thinks that knocking down the village of Sipson to bolt an airport the size of Gatwick on to Heathrow made any sense. The coalition that has emerged against the runway …