Dutch Ukraine vote tests strength of anti-EU mood

A woman attends a flash mob to support a European treaty deepening ties with Ukraine on the eve of a referendum held in the Netherlands, in Kiev, Ukraine, April 5, 2016. REUTERS/Valentyn Ogirenko

AMSTERDAM (Reuters) - Dutch voters cast ballots in a national referendum on Wednesday on the European Union's treaty with Ukraine, providing a gauge of anti-EU sentiment weeks before Britain puts its membership of the bloc on the line.

Launched by eurosceptic groups, the referendum -- whose result is not binding on the government -- is the first since a 2015 law made it possible to force through plebiscites by gathering 300,000 signatures on the Internet.