Tens of thousands more UK citizens applied for citizenship in other EU countries around the 12 months after the Brexit vote than in the previous year, according to data obtained by the BBC.
Ireland received by far the most have applied for dual nationality.
But for all the countries that had data covering July 2016 to June 2017, lotions have more than doubled.
In other countries, which exclusively had the necessary data for calendar years, there was a sharp rise from 2015 to 2016 as well.
Among well-known UK citizens to apply for citizenship elsewhere in Europe is the Oscar-winning actor Colin Firth – it was confirmed last week that his application for Italian citizenship has been successful.