The UK Department for Transport announced that from 11.02.2022, quarantine will be lifted throughout the UK for foreign citizens vaccinated with approved vaccines, as well as for those who are not vaccinated or vaccinated with vaccines not approved by WHO (for example "Sputnik V"). However, for the last two categories, it remains mandatory to pass a COVID-19 test before departure and no later than the second day of stay in the UK.
Also, all passengers will still need to complete the PLF within 48 hours prior to departure to England.
Source: www.atorus.ru