The new data comes as the boss of one testing firm calls for Day 2 testing for arrivals to be scrapped, a move that would end all testing for travellers heading to the UK.
Elsewhere, there are fresh concerns over the rising price of oil, while anyone booked to see Adele in Las Vegas faces disappointment after she postponed her three-month residency just 24 hours before the first show.
Here are the key headlines concerning travel on Friday 21 January.
Travel tests ‘ineffective’ in stopping Covid spread
