I just love my eldest son he came across this
https://www.citizensadvice.org.uk/sc...-on-employment
Hours of work and rest breaks
16 – 18 year olds
If you are over school leaving age and
under 18, the law says that you must not work more than eight hours a day, or more than 40 hours a week.
You must have twelve hours rest between each working day, and two rest days per working week. You are also entitled to a 30-minute rest break when you work for longer than four and a half hours.
Time off for study or training
If you are an employee aged 16 or 17 and have not yet achieved a certain standard of education or training,
you are entitled to reasonable time off work for study or training. The time off should be paid at your normal hourly rate.