I LOVE Fresh & Wild. I cannot rave about it enough. It is expensive, yes - I wouldn't recommend you do your weekly shop here - but the quality and variety of foods on offer here is just astounding. If it's speciality food you're after, for example, gluten-free-sugar-free-dairy-free chocolate, you will be pleasantly surprised at Fresh & Wild. Try their homemade hummus, or grind your own peanut butter there and then. There are always freebies available, too - you can't go wrong with a bit of free, mouth-watering food.
The staff in the Stoke Newington branch are particularly chirpy and bouncy and every time I've been in there (and yes, there have been a lot of times) they've always been happy to go out of their way to find anything out for you. If you want to stop off for some food (check out the hot counters or go for the "Grab & Go" section and try the vegan sushi, fruity porridge or freshly prepared salads) or just for a Monkey Shake beverage you can and in Stoke Newington you can take a seat outside and people-watch.
They also sell 'Green Baby' baby clothes, such as cute all-in-ones - there isn't a massive selection so don't expect a day out clothes shopping for your child just in this store. Or if you feel eating healthily just isn't enough, try Burts Bees' skincare range available in the Organic Beauty section.
I thoroughly recommend any Fresh & Wild store (I'm assuming they're all fairly big).