I'm a nanny - have been for nearly 30 years. I've worked in quite a few places, south Hampshire, north Hampshire, north Kent, East Sussex, Guernsey, London, Cornwall and a few foreign countries, so mainly south/southeast and London but I've known nannies from all over the country (and world!) I've worked for 'normal' families, wealthy families and titled families, the normal families were by far the nicest (and most generous) families to work for. I now go for more normal families who pay me well and treat me with respect.
If you want a nanny get one! It's no ones business but your own. If you have 2+ children, it's generally around the same price as a nursery (although you do need to factor in the extra expenses of someone in your home 40-60 hours a week, heating, food, classes, wear and tear) cheaper if you can accommodated a live in nanny and you can have the children's washing/ironing done, beds made/changed, meals in the freezer, bread and milk in the fridge (one of the things my boss likes about having a nanny is that if anything runs out, I'll pick up replacements) maybe the occasional cake where nanny and charge have baked. (I also drop and collect dry cleaning if we are passing, make extra food for my employers (prawn laksa this evening!) empty bins and sort recycling (although they do it if I don't, more of a shared job) buy shoes and some clothes for my charge, book and wait in for trades persons, also wait in for parcels (booked to come when I know we will be home) or collect from the post Office Depot and return parcels if needed. Sorry, went off on a bit of a tangent there!! You also don't have to have the children up and dressed (maybe breakfasted) and out of the house at the crack of dawn! You can come home to your children bathed and ready for bed, depending on what hours you need a nanny. The children get to play in their own home and play with their own toys. Most nannies will work if your children are ill and take them to doctors appointments if you so wish.
There are pros and cons to all childcare arrangements and you just decide what works best for you and your family. What works for some, won't work for others.