Voting in UK Elections from Argentina: How to Register and Actually Vote

British citizens living abroad have the right to vote in UK general elections. This right was extended indefinitely in 2024 with the abolition of the previous 15-year rule, which had removed voting rights after 15 years overseas. If you are a British citizen living in Argentina, you can vote for your last UK constituency's MP regardless of how long you have been abroad.

Registering as an overseas voter

For related context, see Driving in Argentina with a UK Licence: What You Need to Know.

The process starts at gov.uk/register-to-vote. You will need:

• Your National Insurance number
• Your last UK address (this determines your constituency)
• Your current Argentine address
• Your passport number

Registration is valid for 3 years from the date it is processed. After that, you need to re-register. HMRC and the Electoral Commission may send reminders, but do not rely on them — set your own calendar reminder.

You can register at any time, not just before an election. Registration takes 2-4 weeks to process.

Voting methods from Argentina

Postal vote

You request a postal ballot from your local Electoral Registration Officer. The ballot is posted to your Argentine address, you complete it, and post it back to the UK.

The problem: postal transit between Argentina and the UK is slow. Standard post takes 10-20 working days each direction. An election called at short notice (as often happens in the UK) may not leave enough time for the ballot to reach you and return.

Tips for postal voting from Argentina:

• Request the ballot as soon as registration is confirmed — do not wait for the election announcement
• Use DHL or FedEx to return the completed ballot rather than Argentine standard post
• Budget USD 40-80 for courier return postage if timing is tight
• Some constituencies accept scanned and emailed ballots in emergencies — check with your Electoral Registration Officer

Proxy vote

You nominate a trusted person in the UK to vote on your behalf. They go to the polling station, identify themselves as your proxy, and cast the vote you have discussed.

This is more reliable from Argentina. No postal timing issues. You tell your proxy how you want to vote by phone, email or WhatsApp, and they attend on your behalf.

Requirements:

• Your proxy must be registered to vote in the UK
• They can only be proxy for up to two overseas voters (plus unlimited family members)
• You apply for a proxy vote on the same gov.uk form as your overseas registration

Emergency proxy

If you are registered for postal vote but the ballot does not arrive in time, you can apply for an emergency proxy up to 5 PM on polling day. Call your Electoral Registration Officer and explain the situation.

What you can vote in

You vote only in UK general elections and by-elections for your last UK constituency.

The 15-year rule — now abolished

Until January 2024, British citizens who had been abroad for more than 15 years lost the right to vote in UK elections. The Elections Act 2022 (implemented via secondary legislation in 2024) removed this restriction. All British citizens, regardless of time abroad, can now register as overseas voters.

This is particularly important for long-term British expats in Argentina who had previously lost voting rights. If you left the UK in 2005 and never re-registered, you can now register again.

Practical reality for Argentina-based Brits

Most British expats in Argentina choose proxy voting because:

1. Argentine postal services are unreliable for timed documents

2. Courier return costs money every election

3. UK elections are sometimes called with short notice

4. A trusted family member or friend in the UK can vote more reliably

If you do choose postal, make sure you have a fast courier option prepared and a plan B (emergency proxy) if the ballot does not arrive.

Registration deadline

You must be registered 12 working days before polling day to vote in a given election. Since UK elections can be called with 25 working days notice, that leaves a narrow window. Register now, well in advance, and renew every 3 years.

Not legal advice. Electoral law changes; verify current rules at electoralcommission.org.uk or gov.uk/register-to-vote before any election.

Worth reading next

• Driving in Argentina with a UK Licence: What You Need to Know
• British Schools in Buenos Aires: Your Actual Options for UK-Curriculum Education
• Learning Spanish in Buenos Aires as a British Expat: Schools, Apps and Honest Timelines