And just as much evidence that not ‘learning’ about alcohol when younger does just as much damage – look at the States for one, only legal from 21.
And AFAIK its not illegal to someone under 18 alcohol, although you’d think otherwise (friend of mine wasn’t allowed to buy alcohol in the Co-op because they had their teenage daughter with them – its was a decent bottle of white wine FFS).
Although some confusion is possible:
Between the ages of 5 and 17, it is legally permissible for children to drink alcohol at home or at a friend’s house with the permission of a parent or legal guardian.
and
Purchasing alcohol on behalf of a minor is illegal in all of the United Kingdom. This means acting as the young person’s agent.
http://en.wikipedia.org/wiki/Legal_drinking_age
As for your son, it depends. We usually have in low-strength beers for my youngest (14), he’ll have one or two, now and again. Whereas my older sons drink lager.