The Euro was a form of currency used by several nations in the European Union. (AUDIO: The Longest Night)
The United Kingdom adopted the Euro by 2062. (PROSE: The Last Dodo [+]Loading...["The Last Dodo (novel)"]) However, another source suggested it was adopted in London during the 2000s as part of the Euro-Combine Treaty. (AUDIO: The Wasting)
In 2005, prior to the Dummy Massacre, Colin reported to Doctor Who? that he had, three weeks earlier, seen the Ninth Doctor buying a set of opera glasses and an old Dandy annual in an Age Concern charity shop in Northampton, using what he called a 25Euro note with a picture of the Queen Mother on it. (PROSE: Have You Seen This Man? [+]Loading...{"writer":"Unknown","1":"Have You Seen This Man? (short story)"})
At some point Austria used the Euro. (AUDIO: Better Watch Out)