third lockdown until mid-February, with schools closing and people slapped with a stay-at-home order.On Monday evening, Boris Johnson announced the country would be once again subjected to strict restrictions following a huge increase in Covid cases.If brought into action, passengers will be required to show a negative result from no more than 72 hours before departure.However, rules could be tightened further and new arrivals may need a second test when land on British soil.Under current rules, travellers must fill out a passenger locator form before quarantining if flying from a country not on the Government's 'travel corridor' list.Flights from South Africa have already been barred by the Govt, where one of the new strains has been.