You can normally register to vote up to 12 days before a general election, after which the register closes. British resident living in the EU have been warned by local councils that proxy voting would be more reliable. "We wanted to make you aware of the risks and therefore encourage you to consider arranging a proxy vote instead." As a result, and due to the previous unreliability of postal voting, many Britons have concluded that it's better to register for proxy vote. To apply for a proxy vote you need to download and send in this form to your former local electoral office by either email or post.
Source: The Local October 30, 2019 08:26 UTC