Currency: Bulgarian lev (лв)
Capital city: Sofia
Key phrase to learn: Nazdrave! (Cheers! To your health!)
Time difference: Bulgaria is two hours ahead of the UK
Average flight time: 3 hours.
International phone code: +359
Emergency services number: 112
Public holidays: New Year’s Day (January 1), Liberation Day (March 3), Orthodox Good Friday (Friday before Orthodox Easter Sunday), Labour Day (May 1), Saint George's Day (May 6), Saints Cyril and Methodius Day (May 24), Unification Day (September 6), Independence Day (September 22), Revival Day (November 1), Christmas Eve (December 24), Christmas (December 25-26).
Link to FCO travel advice: https://www.gov.uk/foreign-travel-advice/bulgaria