Pre-registration nursing courses can be either part time or full time.
Full time study often suits not only school leavers but also people who are thinking about switching career, or returning to work after a break.
Having hopped from job to job for ten years, I was working as a pub licensee when I decided to quit and gain my adult nursing diploma.
Why you took a career break (to have children, take a sabbatical, recover from an illness or care for a dependant, for example) or the kind of work you did before isn’t important. You just need to meet the entrance criteria for studying nursing.
If you left school or university some time ago, you may need to show some evidence of academic study. Don’t worry if you haven’t studied recently, there are Access to Nursing courses available across the country. See: What qualifications will I need?
Part-time courses allow you to work while you study, and are aimed at people already working in the healthcare sector. If this route interests you, your options are explained here: Career options and pathways and Routes into nursing.
Going from senior project manager to newly qualified nurse involved a drop in pay, but it has definitely been worth it.