It said its operations had been completely upended by Covid-19 and the resulting lockdown and closure of borders, which have forced big cuts in staff, costs and income.
"We are a resilient business, but this is a global shock to aviation the likes of which we've never seen, and our organisation continues to be materially impacted," chief executive Adrian Littlewood said.
He said the airport's international business had shrunk to 5 percent of what it was six months ago, with the number of foreign airlines falling to 11 from 29.
