Taking time off work: For new and expecting parents
What if I want to take a shorter leave?
You have the right to end your pregnancy or parental leave before you have taken all the weeks you are entitled to. To do this, give your employer a letter telling them when you plan to return to work. You must give them this letter at least 4 weeks before the day you want to return to work.
Or, you can end your leave at any time if you and your employer both agree.