EU citizens living in the UK who aren't British, Irish or from a commonwealth country can't vote in the general election. British citizens living abroad can vote if they've been registered to vote in the UK in the last 15 years.
There are an estimated 3.4 million non-British or Irish EU citizens living in the UK.
There are estimated to be around 3.8 million people born in the UK living abroad, but there aren't complete figures for UK citizens.
This article is part of our Ask Full Fact series on the 2019 general election, answering your questions about the election, from claims the main parties are making to what happens on polling day.
You can see all the questions we’ve answered so far and we’ll keep adding to it as we get through them.