From 1st October 2011 in Scotland, the Alcohol etc. (Scotland) Act 2010 introduces a new mandatory condition for all premises licences and occasional licences requiring that there must be an age verification policy in relation to the sale of alcohol on the premises.
The law has set a minimum age of 25 years for the policy where it appears to the person selling the alcohol that the customer may be under the age of 25 years.
As a result of this change in the law, customers in any premises in Scotland licensed for the sale of alcohol, including pubs, clubs, restaurants, supermarkets and convenience stores may be asked to produce identification where they appear under the age of twenty five to prove that they are over the age of eighteen and can lawfully purchase alcohol.
So, if you are lucky enough to look under 25 you will be asked to prove that you are aged 18 or over when you buy alcohol. If you are under 18 you are committing an offence if you attempt to buy alcohol*.
*Other parts of the united Kingdom have their own legal requirements in relation to customers proving their age before purchasing age restricted products including alcohol.