I've been on a flight with no manned exits
B737 from CDG to Manchester last summer with one overwing exit on each side. Both exit rows behind us was empty, so I asked the FA if we could switch as my husband is 6'5. She told us it would cost however many pounds. We said no thanks (one hour flight). Had I known that it was required for ABP to be in exit row, I would have quoted that. We'll try that next time, although since I usually avoid low-cost carriers like the plague, may not occur again.