If I am 16 years old but would like to bring my friends who are 15 years old, can we go into the attraction without an adult? Unfortunately anyone under the age of 16 must be accompanied by an adult aged 18 years or over. Related articles Are there any restrictions for children at SEA LIFE London? Do Under 3's need a ticket? How old can you be to enter the attraction unaccompanied? How much are tickets to SEA LIFE London? Can I book my disabled tickets online?