Have you heard of form UC1?
You’re not alone if you haven’t – the Electoral Commission makes no mention of it on its About My Vote website except as an “additional form”. UC1 is a form that EU citizens from outside the UK / the Republic of Ireland, have to fill in if they want to be able to vote in EU elections in the UK. It’s brand new – it seems to have been decided that this additional bureaucratic stumbling block was necessary sometime last year.
EU citizens who register to vote in the UK can’t vote in parliamentary elections, but they can vote for local councils and in EU elections if they’ve opted to vote in the UK rather than in their home country. It’s unlawful to register in two locations and vote twice, but it’s unlawful for anyone to do that, and UK citizens don’t have to fill in a separate form saying “I haven’t registered twice and I won’t vote twice” in order to be allowed to vote.