To go to bars and nightclubs – Many bars and nightclubs do not allow people under the age of 18 years to enter some stipulate a minimum age of 21 years and others may have signed up to the Challenge 25 policy refusing admission to anyone who can not provide proof of age.Teenagers and those under 25 use fake ID to get around this policy. Challenge 25 is a policy whereby anyone buying alcohol who appears to be below the age of 25, seven years above the age required to buy alcohol in the UK, can be asked to provide an acceptable form of ID. To buy tobacco products such as cigarettes and alcohol, a person legally has to be 18 years of age across the UK, although many retailers raise that age to over 21 years or even over 25 years.