You must give your employer notice that you want to take a period of carer's leave.
You must tell them:
Your employer can't require you to supply evidence about your request for carer's leave.
If you want to take a period of 1.5 days (or less), you must give 3 days' notice.
If you want to take a period of 2 days or more, the notice must be twice the number of days requested (e.g. if you ask for 5 days, you must give 10 days' notice).
An employer can't refuse a valid request for carer's leave.
However, they can ask you to postpone it if they reasonably believe that your absence during the requested period would unduly disrupt their business operations.
If they do this, they must:
The new date must be agreed by consulting with you – they can't simply impose it.
You can potentially start a claim at an Employment Tribunal if your employer:
You will have 3 months to start a claim starting from the date (or last date) when the leave was postponed or denied. This can be extended if it was not reasonably practicable for the complaint to be made within the time limit, but will depend on the particular facts of each case.
If a claim is successful, the tribunal can award you compensation.