Heathrow Airport today won a Supreme Court challenge over the Government's decision to give the go-ahead for a third runway. A panel of five justices at the UK's highest court allowed Heathrow to expand by building the controversial third runway after the Court of Appeal declared the plans were unlawful. In February three judges concluded that the expansion failed to take into account the Government's commitments on climate change enshrined in the Paris Agreement. Heathrow Airport Ltd, which owns and operates the west London airport, challenged that ruling at a two-day hearing before a panel of five justices in October.