Sponsoship deal?
Probably only if BA is your sponsor and even then I'd be careful how you do it. You don't want to appear demanding in any way. But discreet can work, I remember bringing a bike back from the USA and on a domestic flight there the checkin clerk was going to charge me a fee for the bike until I discreetly showed my pass (I was employed by a different airline) and asked if she could waive the fee and she did.