LONDON (Reuters) – Irish carrier Ryanair, Europe's largest budget airline, might start charging passengers for using the toilet while flying, chief executive Michael O'Leary said on Friday.

"One thing we have looked at in the past and are looking at again is the possibility of maybe putting a coin slot on the toilet door so that people might actually have to spend a pound to spend a penny in future," he told BBC television.

He said this would not inconvenience passengers travelling without cash. "I don't think there is anybody in history that has got on board a Ryanair aircraft with less than a pound."