(of course, they can be both at the same time)
RyanAir is ultra-budget. You need to be ready for the whole thing, but often you can get something much cheaper. As an example, looking for London to Belfast next month, RyanAir is a fifth the price.
I'm unsure about the following. Do you know if flights between London and Belfast be covered under EU airline rules regarding missed and delayed flights?
My question was more to do with the European Single Market, and the considerations given to Belfast during Brexit negotiations. That's where my ambiguity came from.
Thanks for the info!