Q461: Are there any restrictions on the hours and pay for children working?
The Government sets a minimum amount you must get paid on average for the hours you work. This is called the National Minimum Wage or the National Living Wage, if you're aged 25 or over.
The minimum wage has been extended to cover 16-17 year olds, however there is no minimum wage for children under that age. See the linked question on restrictions on hours for children and also the link to the Government's website for the National Minimum Wage and National Living Wage rates.