I suppose it all depends on what you want in childcare.
I don't care much about qualifications apart from first aid. I do care about having someone who cares for my children, who has a similar outlook on life, children, discipline etc as me, I want someone who fits out lifestyle. That applies to any form of childcare. Qualifications matter as they get older but nobody made me do childcare or education qualifications before I became a parent! For my children when pre-school age all I want is someone who will form a bond with them, jump in muddy muddles with them, get the craft stuff out and go on walks.
We have had in the past a brilliant CM who was a former primary school teacher so was well educated in early years. She was fabulous. But her fabulousness stemmed from her approach and her fit with our life. Yes, she did use her knowledge of early years and primary education. She always had activities to do after school for the older ones and while dd was still pre-school age she taught her to read because dd was showing an interest and she was able to use the model that dd would be using at school. However, the qualifications were not what made us choose that CM.
My nearly ex CM (and I do need to do a dance that she is soon to be ex) has a great CV really. She worked in nurseries for years, was deputy manager. She has everything you'd want on paper. Her background gives the impression of someone very competent. The reality is somewhat different. She has endangered my child, has shown herself to be incompetent when accidents occur, is consistently late to school pick up and my children both young and older have been bored with her because she doesn't leave the house so toddler boy was bored, unexercised and unsocialised and the older ones were bored because there was nothing for them to do after school.
Our current nanny who works 3 days a week for us also has a nursery background but is far more competent! Nannying is new to both her and us so we are taking it bit by bit but so far it is going well and toddler boy is very happy with her. Shit CM is to be replaced next month with another one for the other 2 days for after school for the big ones so we shall see how it goes but I think they will be much happier there and toddler boy is using his 15 hours by having 2 days in a very good private nursery which we know well having sent the other ones there too.
Childcare is a nightmare. I suppose why nannies get suggested a lot for people who need awkward hours is that if you have a good nanny it does make life a lot easier. There are no pick ups of drop offs, they do child related chores so while toddler boy is playing in the garden or having some down time mine does the ironing, folds laundry, throws the hoover round. I can have a late finish and she will have fed the dcs rather than my having to pick them up, go home and then try to make dinner/hope the slow cooker hasn't got too dry during the day.
The aupair thing comes I think from the blurring of lines between nanny and aupair. Traditionally an aupair is a younger person who is coming over to learn the language. I don't think the UK signs up to the official agreement defining aupair duties but there is a list that is quite prescriptive in order to try to curb people abusing aupairs. So traditionally they should be doing light babysitting and help around the home in exchange for their board and a bit of pocket money and sole charge should not have been part of their duties. This has changed, older people come over as aupairs, many have experience and qualifiations and many can do more involved work. However, if they are working longer hours and having sole charge then strictly speaking they should be being employed as a nanny not an aupair and should be paid accordingly. Unfortuately there are people around who are willing to exploit young people. I suggested an aupair to someone recently who was in a tight spot and I thought an aupair would be perfect as she was needing before and after school care for a few months but not full time plus the occasional night time babysitting if she got called out for work. So having someone living in seemed like the perfect solution short term. She thought it was a great idea, looked it up and then started telling other people what this poor aupair would be able to do for her and all for .