Anyone wanting to travel to the US from the UK will have to have tested negative for coronavirus within 72 hours of the proposed departure time in order to board their flight.
Millions of people in the UK are spending a historic Christmas Day apart from loved ones as restrictions limit the number of people who can meet in a household.
The Notre-Dame cathedral choir has sung inside the gothic landmark for the first time since last year's devastating fire - complete with hard hats and social distancing in place.
