Originally Posted by
riku2
Implementation wise the middle seat is only blocked if it's empty, so of course nobody is moved (if you change seats/flight). There is no noticeable order of "unblocking". The check in staff can easily override it and perhaps if asked by a couple then they will. I have had someone sit next to me plenty of times on LH with other empty non-blocked middle seats available, so there is no complicated unblocking system for the agents to follow.
With all respect you can't say that what works for LH will work or BA or any other airline come to that.
And you say check in agents can unblock it. Not at BA they can't. Phone calls have to be made, different departments contacted, etc, etc.
Every airline is different.