Your rights as a night worker

If a decent chunk of your working hours fall overnight, the law treats that differently to daytime work, with its own hour limits, its own health protections, and stricter rules if you’re under 18.

Do you count as a night worker?

You’re a night workerYou count as a night worker if you normally work at least three hours of your daily working time during "night time", usually defined as 11pm to 6am. It doesn't need to be every night, just a regular ... if you normally work at least three hours of your daily working time during “night time”. Night time is defined as 11pm to 6am by default, though your employer can agree a different seven-hour period with you as long as it includes midnight to 5am.

This applies whether you work nights every night or just regularly enough that it’s a normal part of your working pattern, not an occasional late shift.

The 8-hour average limit

Night workers can’t work more than an average of 8 hours in each 24-hour period, averaged over a reference periodA reference period is the stretch of time your employer averages your working hours over to check whether you've stayed within the legal 48-hour weekly limit. It's normally 17 weeks, so a few heavy we..., normally 17 weeks. As with the ordinary 48-hour week, averaging means a heavier night can be balanced by a lighter one later in the period.

Your employer decides what counts as hazardous through a risk assessment, but the assessment has to be genuine. A role that’s obviously physically demanding or safety-critical at night should be treated as falling into this stricter category.

Free health assessments

You’re entitled to a free health assessment before you start night work, and at regular intervals afterwards for as long as you continue night working. Your employer has to offer this. It’s free, and your employer arranges it, not you.

If a registered medical practitioner advises that your night work is connected to health problems you’re experiencing, your employer must transfer you to suitable day work wherever that’s possible. This isn’t discretionary once the medical advice is there, though “wherever possible” does depend on what alternative roles genuinely exist.

Extra protection if you’re under 18

Young workers, meaning anyone over school leaving age but under 18, generally can’t work during the restricted period, normally 10pm to 6am, unless a specific exception applies, such as in hospitals, and only where no adult workerA legal category that sits between employee and self-employed. Workers are entitled to certain rights including national minimum wage, paid holiday, and protection from unlawful deduction from wages, ... is available to do the work instead.

No case law, and that’s genuinely the position

Unlike some of the other Working Time protections, there’s essentially no reported case law testing these night work provisions. That’s not a gap in this guide. It reflects how the law actually stands: the protections are set out plainly in the Regulations themselves, and disputes over them rarely reach a level where a written judgment exists.

This doesn’t make the protections weaker. It just means the Regulations themselves, not case law, are the primary source to rely on.

What to do if you think your night work isn’t compliant

Work out which specific protection is actually in question. The 8-hour limit, the health assessment right, and the under-18 restrictions are separate entitlements, and the fix looks different depending on which one is missing.

If you haven’t been offered a health assessment and you’ve been night working for any length of time, ask for one directly and in writing. If your hours are exceeding the 8-hour average, or the absolute limit for hazardous work, keep a record of your actual shifts over a few weeks.

If the wider issue is your overall hours, not just the night-specific limit, this guide on the 48-hour week and the opt-out covers your rights there. Book a call if you want to talk through your specific pattern of night work.