Absence from lessons includes any absence that is not required by a compulsory whole class learning activity, and includes illness, compassionate leave and any other type of absence. This includes half-day absences, late arrival or early departure to and from school.In the event of a student requiring extended time off school, a letter of request is to be sent to the Head of Senior School well in advance of the required absence. For short absences a letter is to be sent to the appropriate Head of Key Stage.