London is the mother of all modern cities? For decades the English capital has the globally accepted standards and was envied by almost every other capital city of the world. Being the center of the British Empire, London evolved into a multicultural hub for peoples from every corner of the planet. These migrants brought along their cultures and traditions and of course their food.
If you can't get it in London, you cannot get it in the rest of the world either. In the 20th century, other cities like Tokyo, New York and Paris have caught up with London or even surpassed it, but London is still one of the culturally most important places in the world.