a reduction in salary of an employee who agreed to work more than 48 hours a week (the legally enforceable average maximum) but later changes his mind and insists on enforcing his right to work no more than the 48 hour maximum is not unlawful. For purposes of Employment Rights Act 1996 s.45A the reduction is not a "detriment", but is merely a consequence of the change of mind.

For relevant general notes see Working Time Regulations/victimisation and/or Working Time Regulations/opting out .