[lmm]

"Soda" is even more of an americanism than "pop". ("Fizzy drink" is the only term I've ever heard used in the UK).

[udp]

“Pop” gets used in the UK sometimes but I’ve only heard it in northern England. Never heard Soda anywhere in the UK though, apart from the specific case of cream soda.

[firstlink]

It's always confused me why Wikipedia calls its UK language version "simple English".

[physicsguy]

Pop is common where I live in the Midlands