These threads are always a sober reminder of how low our expectations need to be set these days for BA in their home country, where a bad experience compared to other airlines and airports, is met with a pile on of "actually, you're lucky it wasn't worse".

OP, you will also be surprised to learn that the 'priority' tag is a gimmick on BA and means nothing. They have a little disclaimer in the small print somewhere about this, explaining they don't actually offer priority baggage. Why they continue to waste money printing up the tags and attaching them to bags is anyone's guess.