It would cost £160 to reserve basic seats together for the return flight. I don’t mind if our family is split up. I don’t even mind the older two children sitting in a row in front or behind one of us parents as I understand this is counted as putting a child ‘beside’ an adult. But would they really put a 3 year old in this situation? Or more like would they put other passengers in the situation of sitting beside a just 3 year old with the parent in another row? This child absolutely would not sit down with a belt on without a parent next to them. Realistically does the airline system try to put small children next to an adult or does the system punish you for not paying?