What is the minimum amount of rest a worker under 18 must be allowed?

Workers under the age of 18 are entitled to: a minimum rest break of 30 minutes in the course of any working day that lasts more than four and a half hours; a minimum daily rest period of at least 12 consecutive hours in each 24-hour period during which they work for the employer (although this rest period may be interrupted if periods of work are split up over the working day or are of short duration); and a minimum weekly rest period of 48 hours (although this may be interrupted in the case of activities involving periods of work that are split up over the day or are of short duration, and may be reduced where this is justified by technical or organisational reasons).