hkz, yes, Wood Green has the biggest Mothercare outside central London that I know of and an H&M with a small maternity section. They also have an Adams Kids that's selling things off if you get in quick, as they're about to go bust (just over the road from Mothercare).
That's not to say Mothercare's wonderful, they're quite shortstaffed and the toilet was disgusting today.
There's also a large branch of Boots, a medium sized M&S very near Mothercare with a cafe, and various other chains. Though we have plenty of pound shops and fried chicken shops in Wood Green too. Still, at least it has a town centre to speak of, unlike Tottenham where I actually live. The Tottenham Hale retail park has some useful places, but we're nearer Wood Green and the Green Lanes Sainsburys also has a small retail park including a fairly big Next with Women's and kids' clothes on the ground floor, where I buy ds everything with dinosaurs on! I'm easily put off by shops which put kids' stuff upstairs.
Wood Green also has an independent kids' shop called Infantasia, but they were really strange with us when we tried to buy a replacement Maclaren raincover there, both about that and about disturbing the clothing display.
HKZ, if you do brave Wood Green's shops let me know, maybe we could meet for coffee (best places M&S Revive but only one toilet, and the Wetherspoon's pub at the northern end of the shops - sounds odd I know, but lots of highchairs, changing facilities, plenty of toilets for heavily pregnant women! And a good choice of refreshments whether you want a meal or a snack).