Ooh. Are the Nappy Valley mothers moving into SW16? That'll be good for house prices (thinking of silver linings).
I think what you encountered were a few of The Entitled. They were like this BC (Before Children) and they are like this now that they have children.
It is a little known fact, but I am going to share it with you, that when Moses was faced with the Red Sea, he sat down, called up a few of the party, and they drew up, and then made, a Time Travelling Device.
Someone climbed in, went forward in time, and picked up an Entitled Mother of a PFB, probably from Northcote Road, and transported her back to the banks of the Red Sea.
She stood there, with Moses and Co waiting pensively behind her, and gave it That Look - the one that says "How Very Dare You Not Realise How Very Special I (and my Offspring, carrier of my genes, and those of my Hedgfund Hubby) am. Get Out Of My Way."
And it parted. Of course. Apologising at the same time, no doubt.
There was much jubilation as the crossing was made, and the Entitle One was returned before too many ripples in the Space-Time Continuum were made.
Fact.