Is the destination on the UK Government Travel Ban list?
https://www.gov.uk/foreign-travel-advice
Will you need to isolate – quarantine, on return?
Air Corridor List
https://www.gov.uk/guidance/coronavirus-covid-19-travel-corridors
The Airline Database – TIMATIC
Timatic is the authoritative guide produced by IATA and is used by airline check-in to ascertain that travellers are permitted to board.
Timatic has always been used for passport and visa eligibility checks.
It’s essential for airlines because if passengers do not have the correct documentation, they can be liable, fined by governments and responsible for return of passengers refused entry.
So the information is very accurate
https://www.iatatravelcentre.com/passport-visa-health-travel-document-requirements.htm