Went to my local Woolworths yesterday and in the Vitamin isle could not get past the crowd of about eight Chinese nationals crowding around the vitamins, kneeling on the floor, taking them out, taking photos and filling shopping baskets. I saw Blackmores among the items. In fact, they were at the Blackmores section. Diagou at work, I would say.
And I don't live in a big city, but nearby.