just to clear it up....
adults (which means people aged 22 and over), £5.73 an hour
workers aged 18-21, £4.77 an hour
young people (those older than school leaving age and younger than 18; you're under school leaving age until the end of summer term of the school year in which you turn 16), basically 16-18 year olds £3.53 an hour
However, you are not entitled to receive the minimum wage if you are:
a worker under school leaving age