Can my employer change my shifts without asking?
There's no law setting rota notice in the UK - so the answer lives in your contract, in custom and practice, and in the rest rules nobody can contract out of.
Whether your employer can change your shifts without asking depends on your contract - not on any specific law, because the UK currently has no statutory minimum notice for rota changes. A flexibility clause usually allows changes with reasonable notice; without one, imposed changes can be a breach of contract. What never changes are the rest rules: 11 hours between shifts applies whatever the rota says.
Can my employer change my shifts without telling me?
Legally, there's no statutory notice period for a rota change in the UK today. That surprises most people. The answer sits in three places instead:
| Where to look | What it decides |
|---|---|
| Your contract | whether hours are fixed, or a flexibility clause allows changes - and any notice it promises |
| Custom and practice | a long-standing pattern (always Mondays off) can become an implied term |
| Working Time Regulations | rest gaps that no rota can breach, whatever the contract says |
What if my contract has a flexibility clause?
Most shift contracts do, and it generally lets the employer vary the rota - but not without limit. The clause has to be exercised reasonably, and every employment contract carries an implied duty of mutual trust and confidence. Changing someone's shifts at 9pm for a 7am start, repeatedly, or in a way that predictably wrecks childcare arrangements, is the sort of thing that gets characterised as a breach of that duty even where the clause exists on paper.
What if my hours are fixed in my contract?
Then changing them is a change to the contract, which needs your agreement. An employer who imposes it anyway is in breach - and the options that follow (raise it informally, then a grievance, then in the worst case a claim) are worth working through in order. In practice most disputes are resolved long before that, because a manager who understands the contract usually just asks.
What counts as reasonable notice?
There's no legal figure, but sensible practice in shift-based workplaces is two to four weeks for a published rota, with a defined process for urgent changes. Employers who publish late tend to think they're preserving flexibility; what they're actually doing is exporting the cost onto people's family lives, which shows up later as turnover.
- Check the contract first - what does it actually say about hours and notice?
- Raise it informally. Managers often don't realise the pattern they've created until someone describes it plainly.
- Put it in writing if nothing changes - a short note asking for the notice the contract promises.
- Use the grievance procedure if it continues; that's what it's for.
- Consider a flexible working request for a fixed pattern - it's a day-one right, the employer must deal with it properly, and the grounds for refusing are narrower than most people assume.
Are the rules changing?
Yes, eventually. The Employment Rights Act package includes rights around reasonable notice of shifts and compensation for shifts cancelled at short notice, aimed at zero-hours and low-hours workers. Those provisions are not yet in force and are expected in 2027 - see rota change notice for what's coming, and business.gov.uk for the official timeline. Until then, the contract governs.
What can't change, whatever the contract says
The rest entitlements: 11 consecutive hours between shifts, 24 hours' rest a week, a 20-minute break beyond 6 hours, and the 48-hour average cap unless opted out. A shift swap that breaches those is unlawful even with everyone's agreement - full detail in rest between shifts.
Keep reading: All 66 HR guides · 30 free templates · 24 calculators
Rotas people can plan their lives around
CoDash publishes rotas people can see in advance, with swaps, shift notes and default hours already on the record.