Thanks :) I’m not sure either, I didn’t include it for the same reason I didn’t include Norway for Norwegian Wood, it feels too indirect a reference to be about the place itself.
This one is more obscure and debatable, but the "Cast Iron Shore" in Glass Onion refers to an area of south Liverpool: https://en.wikipedia.org/wiki/Cast_Iron_Shore
Wondering whether Savoy counts in Savoy Truffle. Not sure if the sweet took its name from the hotel or the region though...