Britain's May defies critics to back new $22 billion Heathrow runway

By Kylie MacLellan and Sarah Young LONDON (Reuters) - Britain on Tuesday backed a $22 billion expansion of Heathrow Airport, ending 25 years of indecision and promising to boost global trade links following the vote to leave the European Union. Heathrow, Europe's busiest airport, defeated a proposal from smaller rival Gatwick and will secure the first new full-length runway to be built near London in 70 years after environmental and political protests scuppered previous attempts. Prime Minister