The guidelines almost a mirror of the eu laws.
You cannot be forced to work over 48 hours a week over a standard reference period of 17 weeks.
You can opt out of the 48 hour weekly limit if you agree this with your employer in writing.
It is possible to work a 12 hour night shift as long as the average length of a night shift does not exceed eight hours in a 24 hour period, when measured over a standard reference period of 17 weeks.
Advice guide for RCN members on working time, including Working Time Regulations, agency work, breaks, compensatory rest, health assessments and on-call work.
www.rcn.org.uk