So I have an upcoming flight to Scotland (of which I still have a valid UK visa for).
But it just occurred to me for budget airlines e.g. EasyJet etc. if they offer online check-in with boarding pass, then you can head straight to the gate. In such a case, how do they determine that you have the required visa documents for travel ?
With full fledged airlines at the check-in desk they normally check your visa before issuing your boarding pass.