https://www.euroconsumatori.org/en/sample_letter_bus_passenger_rights
Bus Passenger Rights
For requests pursuant Regulation (EU) No 181/2011 in case of relevant delays, cancellations or overbooking for long distance bus services (250 km or more).
bus passenger rights
https://europa.eu/youreurope/citizens/travel/passenger-rights/bus-and-coach/index_en.htm
Bus passenger rights - Your Europe
Travellers' rights – delays, cancellations and overbooking when travelling by bus or coach
bus passenger rightsyour europe