Until now, travelers entering the United Kingdom from pretty much everywhere in the world were required to self-quarantine for 14 days upon entering the country, but since July 10, it has all changed.
The UK is now allowing residents of more than 70 countries and territories to enter the country without having to quarantine. Before you ask — no, the US is not on the list, meaning US citizens will still be required to quarantine for two weeks if they want to visit the UK.