Harry, it is true that I was thinking of passengers using UK airports ... not specifically one nation! It may not be a significant global problem in the light of the present COVID-19 restrictions and procedures, but it is certainly significant for the cabin crew, gate agents,check-in staff and other passengers who have contact with those who have over-imbibed during their journey. Of course we are all aware that the purpose of cabin crew is the passengers' safety, and by withdrawing the purchase of alcoholic beverages before a certain time of day - might 10am GMT be considered reasonable? helps to level the playing field so that the cabin crew et al can do their jobs to their best potential without insensitive, boorish and unacceptable physical behaviour. It also makes for a pleasanter atmosphere for everyone else in the metal tube with no exit once airborne.