Guardian: A third runway at Heathrow airport would be scrapped by a Tory government that would instead build a £20bn TGV-style high speed rail link between London, Birmingham, Manchester and Leeds. In one of David Cameron’s boldest moves on the environment, the party will today unveil plans to cut 66,000 flights a year from Heathrow by tempting passengers on to the first new rail line north of London in more than a century. Theresa Villiers, the shadow transport secretary, told the …