Ole & Steen UK

You'll find yourself in More London Place, just south of Tower Bridge, standing in a proper queue because Ole & Steen does things the old-fashioned way. This is where Londoners come for their sourdough fix — not the Instagram loaf, but the real thing, with that perfect crust-to-crumb ratio that actually makes you taste the flour. Their croissants have that shattering lamination that suggests someone's been up at 3am, and their cinnamon rolls could genuinely ruin you for every other bakery in the capital. Fair warning: it gets rammed at weekends, and they run out of the good stuff fast.