UK driving licences can be used when visiting EU/EEA countries with some exceptions. International Driving Permits might be needed in some cases. Depending on which convention the country in question has ratified, a 1949 IDP (Geneva Convention on Road Traffic) might be required in some EEA countries, and a 1968 IDP (Vienna Convention on Road Traffic) in others. However, none of the EEA countries currently require IDPs for visitors staying shorter than 12 months.
