Originally Posted by jack_essex
So just to clarify,
I will check in online 24 hours before my flight time, but not print the boarding pass out. I will get to the airport and then use a self service check in desk to print out my boarding pass.
Yes, that's exactly it. It's not really quite what BA would like you to do, and I know that other people prefer to print out their own BP at home, but this is the way that I prefer it.
Occasionally, you'll find that you can't get the self-service machine to print the BP, but then a check-in desk will be able to do it instead. But most of the time, the machine works perfectly well. You can actually have a last go at seeing for yourself if there are better seats to change to at that point - I think I forgot to mention that earlier.