An interesting thread with a bit of thread drift but nevertheless looking at the issues from percieved different corners.
I wonder had this been Ryanair would we be already on page 25 with claims of poor skills, charging for toilets, crew paying to fly etc ad nauseum, thankfully we have not degenerated into that.
Humans make mistakes, some big, some small and in 99.99% of cases thankfully involving air crew nobody notices and hopefully somebody learns a little bit. Computers are great until you unplug them.
On a crew with this level of experience its a "oh ****" moment that puts all future career prospects on hold while everybody digs the life out of it.
Ultimately there is a responsibility by the airport operator to get it right as the tiny slip up almost has a catastrophic ending.
As a poster has said its the easy ones that you get caught with.
It will sadly not be the last incident like this on an airport, next time I hope for same outcome as the BA one.
Whatever else they did they still got it in the air and underpants can be changed.