A lot of people do speak English. Some probably, even though not from UK, on a native level. Yet still, coming to Europe and demanding people to speak English is not the way to go. I don't say that you have to be proficient in all european languages but at least an attempt of communication is a sign of respect. I've seen situations when english-speakers were following a strategy based just on shouting louder in their own language. Certainly not the way to experience the cultures and augment your worldview.