Originally Posted by
antichef
I have put one of the tags
inside each of the bags that may get checked. Then if it gets mis-routed or the luggage tag goes missing, there is a fair chance that when it is checked for ownership BA might be able to contact its own GCH and maybe facilitate a reunion

Yes I do that as well substituting the Gold tag for the back of a fag packet with my contact details written on it.
You are of course banking on someone having the sense to look for such a thing. Given I once had a bag sitting in MAD for nearly a month with the routing tag as well as ID tag still attached to the outside of the bag I have my doubts.