That's not one of the 18 countries in the Eurozone, though. The Eurozone consists of: Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain.
The UK is one of the 10 countries in the EU but not in the Eurozone: Bulgaria, Croatia, Czech Republic, Denmark, Hungary, Lithuania, Poland, Romania, Sweden, and the UK.