Originally Posted by
Krystal n chips
...wouldn't have fancied doing a seat removal / re fit on a 1-11 every night.
It was similar when the same airline/type used to do troop charters in their earliest times (principally to Germany, contract inherited from British United) - the RAF maintained their requirement for rearward-facing seats, so they had to all get unbolted and turned round, and refixed afterwards.
Sometimes with delays there wasn't quite enough time afterwards to put them back, so the next rotation from Gatwick to Edinburgh or wherever had the scheduled pax facing a funny way ... !