Greece holds world's most expensive opinion poll

With the European elections just days away, the leaders of Greece's main political parties are feverishly touring the country in order to persuade voters to cast their ballot

The cost of organising the elections is expected to top 150 million euros, more than double the 60 million spent holding national elections in 2007. Although public interest in European issues is low, Sunday's vote is widely considered to be a litmus test for the ruling New Democracy party's standing.