There are different types of leave. If you are employed and you take holiday, your pension build-up will continue as usual. Parental, sabbatical, study and life-course leave is statutory (unpaid) leave. In this case, the build-up of your pension and the partner's pension (pension for your partner when you die) ceases.
If you would like to continue to build up pension yourself during your statutory (unpaid) leave, that’s no problem.
You do this using the request form for voluntary contribution of pension build up. In the case of life-course leave, you must submit it within three months of the starting date.