Originally Posted by rather_be_on_a_griffin

I have done something similar in the past and it was nonissue. The computer beeped but I think it was just the usual emergency exit message and the check in agent explicitly checked we had non emergency seats for the kids

Originally Posted by EsherFlyer

BA's definition of parent next to child including ahead / behind row and age 12 for emergency row exit means you should be fine even if you have to put the older child next to your wife in exit row: https://www.britishairways.com/en-gb...-seating-terms. And that has been my experience, albeit not on UD.

Originally Posted by rapidex

12 Year olds are allowed to sit in exit rows, so only your youngest is excluded.