hola Chris,
I answer your question to Andreas down here but DR1 delete it.
So another "kind"try.......
Use travellers with english Pound and just 20$US in case your ticket nit include the tourist-card.
Double exchange at the moment (the US$ is very up)makes no sense.And ATM cash is to europeans (don't know UK, but all....) very, very expensive, they give you a bad value and charge you for cash money a lot more.
I have CC since almost 30y and live here many years to, so I don't know why they delete this important (to europeans)and correct info.
cu/charly