The pound sign, cherished symbol of many eurosceptics

eurosceptic

/ jʊ^ərɵˈskɛptk / noun

a person who is opposed to being a member of the European Union:
Eurospectics make up a powerful minority within the party.

Eurosceptic is also an adjective:
Eurosceptic MPs had long been calling for a referendum on the UK’s membership of the EU.