Donpizmeov
Well, I have seen on occasion Dom being opened pre departure so they do Dom Don though, they do Dom Don!
JAARule
Many airlines, including BA have bespoke labels on the champagne, EK is not unique. It is the real stuff as the champagne houses would not allow their product to be diluted with inferior quality so that comment merely highlights your ignorance. It's also there to ensure the crew can't claim to have 'purchased' it from duty free. The only BS appears to be coming from you....as usual.
Harry