Business Green: As the chances of a third runway being built at Heathrow recede further with every poll point Labour loses, airport operators are turning their attention to proposals for a second runway to be built at London’s second largest airport, Gatwick. However, opposition to the plans is already building, with both the Conservatives and Liberal Democrats pledging to block any proposals for a second runway if elected — just as they have vowed to reverse the government’s decision to expand …