I park my burly, 5' 8 son outside in the car park these days when we visit the UK & are in a supermarket, for fear his presence will kibosh my buying a bottle of wine.
Obviously, I could sink a bottle of scotch with him the minute we were on private premises & that's quite legal. He's just turned 13.
We live in a notionally dry country overseas. Ds is usually the one who signs on my behalf for the booze delivery, as it's ordered on a weekend along with the takeaway he & his sisters are expecting. This is fine.
Truly, the law is an ass in the UK. I've no issue at all with being asked for ID in my 40s. No problem. Just ask for id for ALL liquor sales & save the cashier having to make a judgement, would make sense to me.
But if I'm dodgily buying booze for an underage drinker, I'd make them wait outside in the car park, no?
Just like I now do with my ds. Who won't be getting a sniff of the booze but now can't amble round tesco with me & help carry the bags.
It's utterly a daft set up. I'm an ex pub landlady, so I've checked id for hundreds of people. The responsibility should fairly end at point of sale... & that's without the fact that having bought your booze, be it babycham or Absinthe, you can quite legally hand it over to the teenager you've told to skulk in the car park as soon as you're home.