Bulgaria entry requirements: Travel restrictions and if you can go on holiday to the UK green list destination
Travel Vaccines and Advice for Bulgaria | Passport Health
Bulgaria Travel Advice & Safety | Smartraveller
TTG - Travel industry news - Bulgaria bans UK holidaymakers on eve of green list switch
Bulgaria - Traveler view | Travelers' Health | CDC
Travel to Bulgaria COVID Restrictions: Learn More
Travelling in Europe
Documents Concerning Travel Restrictions for Certain United Nations, Diplomatic, and Consular Personnel | International Legal Materials | Cambridge Core