Does my employer have to agree?

Not automatically. But a statutory request has to be considered properly, and a refusal should be explained. Acas guidance sets out the process and the grounds employers can rely on.

Can I ask only to change my working pattern?

Yes. Leave the hours the same and describe the days or times you want in the comments field.

Send-a-Letter.co.uk

Request a change to your hours

A request to change your hours or working pattern should be made in writing. This letter records your request and the date you want it to start.

Your details

Full name Street and number

Postcode Town or city

Who are you writing to?

Name of the company or organisation Street and number

Postcode Town or city

Country

About your letter

Current hours per week (optional)Requested hours per week (optional)Preferred start date (optional)Allow time for your employer to consider the request.Additional comments (optional)For example caring responsibilities, study or health.

Preview of your letter

This is exactly what goes on paper.

Full name

Name of the company or organisation

25 July 2026

Re: Request to change working hours

Dear Sir or Madam,

I ask you to consider my request and to reply in writing. If the request is refused, please set out your reasons. I am happy to discuss how the change could work in practice.

Yours faithfully,

Full name

Email address We send your confirmation here.Send by recorded deliveryWith proof of posting and proof of delivery.

What to look out for

Say clearly what you are asking for: the hours, the days and the pattern you want.
Employers are expected to consider a statutory flexible working request properly and to give you a decision in writing. Acas publishes free guidance on the process.
Suggest how the change could work for the business — cover, handovers, a trial period. It makes a yes much more likely.
Keep a copy: the date of a written request matters if the decision is later reviewed.

FAQ

Does my employer have to agree?: Not automatically. But a statutory request has to be considered properly, and a refusal should be explained. Acas guidance sets out the process and the grounds employers can rely on.
Can I ask only to change my working pattern?: Yes. Leave the hours the same and describe the days or times you want in the comments field.

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