Do i need transit visa if I'm flying from nigeria to Bulgaria with british airways?

it doesnt matter the airlines,it matters ll you need to go out of the bulgarian airport or need to stay there for more than 24 hours.if u got a transit stay in bulgarian airport for not more than 24 hours then you wont need transit visa.if you have to stay more than 24 hours or wanna go out of the airport then yes you ll need transit visa