Western Europe's biggest airport signals a second day of cancellations and delays looms.
Travel chaos on bank holiday likely to continue as some flights into country delayed by up to 12 hours.
It comes after the sovereign rejected the airport's first zany idea...
British Airways has now paused selling short-haul flights out of Heathrow.
The transport secretary also accused the aviation industry of cutting too many jobs during the pandemic.
Wagner Araujo and his wife Elaine flew into Heathrow from Brazil, one of the 33 countries on Britain's "red list" of high risk destinations. They now have to pay £2,400 as a couple for a 10-day quarantine hotel package.
Arrivals from “red list” countries begin 10-day stays, costing £1,750, as one couple says they are going "crazy already".
Officers faced a "race against the clock" to return a four-year-old girl to her mother.
The London airport has been overtaken by Paris’s Charles De Gaulle as Europe’s busiest.
The tests, which are now available, give results within an hour – but you may still need to quarantine.