Your son is entitled to receive at least �3.30 per hour unless he has a 'contract of apprenticeship'.
Quote 1:
"A contract of apprenticeship has been defined by the Court
of Appeal as �a contract in which a master undertakes to
educate and train the apprentice in the practical and other
skills needed to practise a skilled trade (or profession) and
the apprentice binds himself to serve and work for the
master and comply with all reasonable directions�. Generally speaking, it will be a written contract which should specify the rights and obligations of both the employer and the apprentice; what training is to be provided and to what level; the length of the apprenticeship and the rates of pay. But in the event of a dispute as to whether any particular contract is a �contract of apprenticeship�, it must ultimately be a matter for the courts or tribunals to decide."
Source:
http://www.dti.gov.uk/files/file11671.pdf?pubp dfdload=04%2F1253
Quote 2:
"If you are under 18 and over school leaving age (you are under school leaving age until the end of the summer term of the school year in which you turn 16) you are classed as a young worker.
Young workers cannot usually be made to work more that eight hours a day or 40 hours a week. These hours can't be averaged over a longer period. "
Source:
http://www.direct.gov.uk/Employment/Employees/ WorkingHoursAndTimeOff/WorkingHoursAndTimeOffA rticles/fs/en?CONTENT_ID=10029426&chk=ssA2%2Bq
Chris