Issued 29 Feb 2020
Plans for a third runway at Heathrow Airport face an uncertain future after the Court of Appeal said the government's decision to allow it was unlawful.
The idea to expand Heathrow has been talked about for many years and while many businesses support it, the plan has also attracted a lot of opposition from environmentalists and local residents.
What is the Heathrow expansion plan?
Heathrow is already the UK's busiest airport, serving about 80 million passengers per year. The airport currently has four terminals and two runways.
If the plan had been given the green light, construction of a new runway was expected to be completed between 2028 and 2029.
What happens next?
On 27 February 2020, the Court of Appeal ruled the decision to allow the expansion was unlawful because it did not take climate commitments into account.
The judges said that in future, a third runway could go ahead, as long as it fits with the UK's climate policy.
Not surprisingly, Heathrow bosses want to keep alive the plans for the redevelopment and believe that they can.
A spokesman said they were confident an appeal to the Supreme Court "will be successful" and added they would work with the government in overcoming obstacles to the plans.
However, local politicians said they hoped it would prove to be the end for the scheme.
Mayor of London Sadiq Khan said the right choice for the government was to abandon the plan.
In response, the government said it was "for Heathrow and the courts to decide" whether the expansion should go ahead.