Just stumbled over this in the morning. First I have seen about it, does anyone have some further info?

https://www.reuters.com/article/us-health-coronavirus-britain-travel/passengers-banned-from-boarding-flights-to-uk-without-negative-covid-19-test-the-telegraph-idUSKBN29A2OH(Reuters) - Airlines flying into the UK will be required to bar passengers from boarding if they do not have a negative COVID-19 test within 72 hours of departure, the Telegraph reported bit.ly/3b6vVLs late on Tuesday.

Every traveller coming into any UK port or airport will be expected to have a negative PCR test to enter the UK as part of a significant toughening of border controls, the report added.