Tracey, you can't demand a part-time job if your job is full-time, even if you cut back some hours prior to leaving. If you leave a full-time job, your employer does not have to offer you part-time. However, if you cut down to part-time pre-maternity leave, your boss can say that there is no full-time post for you. But if you're contracted for full-time, you can't demand part-time and have full legal back-up for it.