Thanks, OWO
Lots of Dora and lots of Ready Brek, so far 
I started my Nursing training, to become a qualified Staff Nurse, when my DS was 20 months old, did my first year, completed it, then had a 'break' to have DD, who is now 3.2. I haven't been able to afford the childcare to do my last two years yet, so am going to finish when DD is at school full time, next year.
While I was a student nurse, the hospital I worked for was advertising for NA's (Healthcare Assistants, Healthcare Support Workers, it's all the same role/band, but different places call it different things). You didn't need any care qualifications as such, but some experience, which I had due to my practise placements in the hospital. There was a day long interview process with a maths test and a literacy test.
I now work for the Nurse bank, which means I book my own shifts week to week, and often work on different shifts each time. It's very flexible, and if I don't want to/can't work for any reason, I just don't book any shifts. Likewise, if there is a week or four two where we are very skint, I can book one every day, or even switch to nights, for the bigger money. As long as you're not at all fussy where you work, department-wise, there are enough shifts to work full time, most of the year, if you wanted to. Downside - no holiday pay, no sick pay, no annual leave. You don't book shifts, you don't get paid. The flexibilty is amazing though, and it's a lifesaver :)