Dh works for a large manufacturing company where there is a strong union presence. They work under a collective agreement between Union/Company. Dh and hundreds of others want to work more than their 48 hour average week and the company want them to as well. The Union however do not want them to do this and say they will be breaking the law. From what I can see the 48hour WTR is supposed to safeguard employees from having to work more than 48 hours, not preventing them if they so wish. Can anyone throw any light on this esp (a) can dh and others opt out; and (b) is it actually law?