UK laws, straight from the horse-thieves' mouthpiece:
That seems to be it.
I don't think age is the issue. I think culture is the issue. As long as Radio 1 broadcasts soem dozy ***** saying "Ah 'ad a grehht weekend. I wore to'ally 'ammered. Can't remember a fing after lahk seven o'clock Frahdeh, wohk up in a strehnj bed lahk rilly sorr Sundi mornin', no ideah 'ow ad got tha, musta bin fun lahk, ad a rilly bangin' ed," and people seek to emulate this behaviour because it is considered cool, it's going to go on. You can set the drinking age anywhere from 16 to 25 without making much difference to drunken 15-yr-olds or drunken 26-yr-olds.
Note: some punctuation marks have been replaced with the most similar mark compatible with this forum as the marks used in the original text were not correctly displayed. The text as shown here is not considered to be significantly different from that on the website as a result of these changes.
Alcohol, young people and the law [http://www.direct.gov.uk/en/Parents/Yourchildshealthandsafety/Youngpeopleandalcohol/DG_10026211]
What the law says
It is against the law:
* to be drunk in charge of a child under seven in a public place or on licensed premises
* to sell alcohol to someone under 18, anywhere
* for an adult to buy or attempt to buy alcohol on behalf of someone under 18
* for someone under 18 to buy alcohol, attempt to buy alcohol or to be sold alcohol in any circumstances (unless acting at the request of the police or a weights and measures inspector)
* for someone under 18 to drink alcohol in licensed premises, with one exception - 16 and 17 year olds accompanied by an adult can drink but not buy beer, wine and cider with a table meal
* for an adult to buy alcohol for a person under 18 for consumption on licensed premises, except as above
* Children and alcohol - what the law says in more detail [http://www.opsi.gov.uk/acts/acts2003/ukpga_20030017_en_10#pt7-pb4]
Drinking at home
It is not illegal for a person under 18 to drink alcohol at home or at a friend's house. Parents can choose to give young people some of their own alcohol when at home.
Children and Young Persons Act 1933 (c. 12)
12The Children and Young Persons Act 1933 is amended as follows.
13In section 5 (giving alcohol to a child under five) for "intoxicating liquor" substitute "alcohol (within the meaning given by section 191 of the Licensing Act 2003, but disregarding subsection (1)(f) to (i) of that section)".
14In section 12 (failing to provide for safety of children at entertainments)-
(a)in subsection (3) omit the words from ", and also" to the end,
(b)in subsection (5), for paragraph (a) substitute-
"(a)in the case of a building in respect of which a premises licence authorising the provision of regulated entertainment has effect, be the duty of the relevant licensing authority;", and
(c)after that subsection, insert-
"(5A)For the purposes of this section-
(a)"premises licence" and "the provision of regulated entertainment" have the meaning given by the Licensing Act 2003, and
(b)"the relevant licensing authority", in relation to a building in respect of which a premises licence has effect, means the relevant licensing authority in relation to that building under section 12 of that Act."
15In section 107 (interpretation), omit the definition of "intoxicating liquor".
Children and Young Persons Act 1933 (c.12) [http://www.opsi.gov.uk/RevisedStatutes/Acts/ukpga/1933/cukpga_19330012_en_1]
...
3 Allowing persons under sixteen to be in brothels
(1)If any person having [F1responsibility for] a child or young person who has attained the age of four years and is under the age of sixteen years, allows that child or young person to reside in or to frequent a brothel, he shall be [F2liable on summary conviction to a fine not exceeding [F3level 2 on the standard scale]], or alternatively . . . F4 or in addition thereto, to imprisonment for any term not exceeding six months.
...
5 Giving intoxicating liquor to children under five
If any person gives, or causes to be given, to any child under the age of five years any intoxicating liquor, except upon the order of a duly qualified medical practitioner, or in case of sickness, apprehended sickness, or other urgent cause, he shall, on summary conviction, be liable to a fine not exceeding [F1level 1 on the standard scale].
That seems to be it.
I don't think age is the issue. I think culture is the issue. As long as Radio 1 broadcasts soem dozy ***** saying "Ah 'ad a grehht weekend. I wore to'ally 'ammered. Can't remember a fing after lahk seven o'clock Frahdeh, wohk up in a strehnj bed lahk rilly sorr Sundi mornin', no ideah 'ow ad got tha, musta bin fun lahk, ad a rilly bangin' ed," and people seek to emulate this behaviour because it is considered cool, it's going to go on. You can set the drinking age anywhere from 16 to 25 without making much difference to drunken 15-yr-olds or drunken 26-yr-olds.