Letter of agreement to opt out of maximum weekly working time.
[ON HEADED NOTEPAPER OF EMPLOYER]
[WORKER'S NAME AND ADDRESS]
Dear [NAME OF WORKER]
Agreement to opt out of maximum weekly working time
Under regulation 4(1) of the Working Time Regulations 1998 a worker's average working time, including overtime, must not exceed 48 hours a week unless the worker has previously agreed otherwise in writing.