The British Pound is the currency of
U.S. Outlying Islands, Guernsey, Isle of Man, Jersey, United Kingdom
The Euro is the currency of
Åland Islands, Andorra, Austria, Belgium, Cyprus, Estonia, Finland, France, French Guiana, French Southern Territories, Germany, Greece, Guadeloupe, Vatican City, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Martinique, Mayotte, Monaco, Montenegro, Netherlands, Portugal, Kosovo, Réunion, St. Barthélemy, St. Martin, St. Pierre & Miquelon, San Marino, Slovakia, Slovenia, Spain