Long-winded and somewhat feminist explanation coming up
but it's a truthful one...
I wanted to keep my full-time job and pension and not go part-time.
DH contracts (which can be patchy) so can be anywhere in the country and so I have to do the school run. Having spent 12 years in post-school education and another ten getting postdoc experience and a good position I was blowed if I was going to drop everything I'd worked hard for, just because school hours are a nightmare for working parents and because everyone expected me as the woman to do just that.
We couldn't find a childminder willing to start at 7am so I could drop off and commute while she did the school runs, feed DS and got him ready for collection at 6pm. I also didn't want to have a child to then outsource him completely.
I tried working out the timings with pre- and after school clubs for all local schools but none of them would permit me to get to work on time. It's a niche job so I can't just up and move jobs as about two come up in the UK a year. And could be anywhere in the UK.
I realised it would only work if we could choose a school close to my job, so we travel together and I drop-off straight to breakfast club. Of course state catchments won't allow this given the distance involved. So he goes to a prep close to work. And we talk in the car, he does his spellings, reads, all the stuff he'd have to do anyway at home where there are more distractions.
It works very well for us, and we have more income with me working F/T and DS going private than we would if DS went state and I had to give up my job and pension and I'm not bored silly.