Also, Motherland describes itself as depicting the 'pitfalls of
middle class parenting', therefore Mumsnetters will watch it out of duty to copy some tips and tricks to up their social climbing game. Of course everyone will identify with Julia or Ann, they are the most repressed, professional characters in the show (and will be something of a chuckle to the average middle class) - Amanda and Liz would be far too unabashedly common and self assured for the MN aspirational taste. I think Motherland went over their heads a bit.
One thing I do like about Julia is she doesn't own one iota of snobbery or class anxiety. She's so self focused that people are just people to her - they either get in her way or make her life easier. She doesn't tend to judge people, so in that sense alone, I would insist NOBODY on mumsnet identifies with her, lol!
The site could do with a generous helping of posters who emulate Liz, who ironically knows how to fend for herself, picks and chooses whatever she likes, and doesn't suffer fools. In comparison MN feels like wading through a gaggle of terrified, provincial convent girls eagerly swatting away sexual tension by wearing a bra with too tight a band size and obsessing over other people's wealth. I wonder if any of these people have ever actually experienced fun. Or an orgasm for that matter.
Also off topic, but is that Natasha/Russian Doll in your av?

One of my all time favourite series.