British Airways has begun operating services between London Heathrow and Edinburgh and Glasgow airports using 259-seat Boeing 767s.
The Oneworld carrier is flying up to two round trips daily to the Scottish cities using the larger aircraft "in order to maximise capacity on the routes".
Since the takeover of BMI by BA parent IAG, there have been fewer overall seats available between the two Scottish destinations and Heathrow.
BA usually operates both routes using Airbus A320-family aircraft.
Source: Air Transport Intelligence news