For British citizens living abroad
You can still vote in UK elections.
Here's how — and proof it counts.
Since January 2024 there is no time limit — any British citizen who has ever lived in the UK can register as an overseas voter. Around 3.3 million people qualify. At the last general election only 191,338 were registered.
The practical bit
How expats vote: four steps, one afternoon
-
1
Register online — it takes 5 minutes
Go to gov.uk/register-to-vote and register in the normal way. You register at the last UK address you lived at (or were registered at). You'll need that postcode, your National Insurance number if you know it (optional), and possibly your passport details.
-
2
Vote in UK Parliament elections
Overseas voters can vote in general elections and by-elections — and in some referendums. You can't vote in local or devolved elections (Scottish Parliament, Senedd, NI Assembly).
-
3
Get a proxy vote (strongly recommended)
Postal ballots sent abroad and back often arrive too late — anything delivered after 10pm on polling day doesn't count. From Australia, the US or Asia, postal voting is a coin flip at best. Instead, nominate someone you trust in your old constituency to vote for you at gov.uk/apply-proxy-vote (your proxy can also apply to receive your ballot by post).
If your last address was in Northern Ireland, you can't vote by post from overseas at all — proxy or in-person only.
-
4
Renew every 3 years
Overseas registration lasts three years. Your electoral registration office will send a reminder — miss it and you drop off the register. Voting in person if you're back in the UK on polling day is fine too, but bring photo ID.
Deadlines at a general election
before polling dayRegister to vote
before polling dayApply for a postal vote (GB)
before polling dayApply for a proxy vote
Election campaigns run just 25 working days, so register now — don't wait for the next election to be called.
The evidence bit
Could your vote have changed 2024?
Overseas votes count in the constituency you last lived in. Find yours below — enter the postcode of your last UK address or search by name — and see exactly how it was won, where it sits on the map, and whether an organised expat turnout could have flipped it.
The postcode of the last address you lived at (or were registered at). It's only used to find your constituency — nothing is stored.
Not sure of the exact name? Try your old town, e.g. “Bournemouth”.
Every constituency — who holds it, and how tightly
The hex map gives every constituency equal space; the geography view shows real shapes and lets a postcode zoom in. Drag and scroll to move around either map, and tap any constituency for the full breakdown — winner, majority, and how it compares to the overseas vote. “Commons now” follows defections and by-elections (as of 15 September 2026); “July 2024 result” shows the election that produced these numbers. “Left–right” colours each seat by the approximate placement of its current holder — placements follow standard expert surveys, are contested, and exist only to orient, not to judge. “Projected” applies an illustrative uniform national swing to July 2024 results — a what-if, not a forecast. Boundaries: ONS Open Geography Portal (July 2024 set). Hex map layout: Automatic Knowledge (CC BY 4.0). Postcode lookup: postcodes.io. Current standings: Wikipedia, UK Parliament.
The 8 tightest results of 2024 — every one decided by fewer than 100 votes
Tap any seat to see the full breakdown.
Why bother?
The evidence that expat votes matter
seats were decided by fewer than 100 votes in 2024.
seats were decided by fewer than 1,000 votes.
seats — 2 in every 5 — were decided by fewer than 5,000 votes.
is roughly how many eligible overseas voters would attach to a typical constituency if spread evenly (3.3m ÷ 650) — more than most winning margins.
was the entire Brexit margin in 2016 — smaller than the expat electorate, of which only ~230k could vote under the old 15-year rule.
seats: the Liberal Democrats won 72 on 3.5m votes in 2024 while Reform won 5 on 4.1m. Under first-past-the-post, where votes land decides everything — and expat votes land in specific seats.
“I live abroad — my vote won't change anything.”
Tell that to Hendon, won by 15 votes. Or the 50 other seats decided by under 1,000. An organised overseas turnout attached to the right seats — Australia alone holds over a million British-born residents — is one of the largest untapped blocs in UK politics.
Trust, but verify
Sources & caveats
- Voting rules, deadlines and registration process: GOV.UK — Register to vote and Voting if you move or live abroad.
- Overseas elector numbers, history and eligible-voter estimates: House of Commons Library briefing SN05923, “Overseas voters”. Registered overseas electors at GE2024: 191,338. Eligibility estimate: 3.2–3.4m (2021 impact assessment). UN estimate of Britons abroad: 4.8m.
- Constituency results (winner, majority, turnout, runner-up): Results of the 2024 United Kingdom general election (Wikipedia, cross-checked against Commons Library data).
- Constituency boundaries (the July 2024 set used at the general election): ONS Open Geography Portal, Westminster Parliamentary Constituencies July 2024 Boundaries UK BUC, simplifed for the web. Map rendering: Leaflet.
- Postcode → constituency lookup: postcodes.io (open data under the Open Government Licence). The postcode you enter is sent to postcodes.io to find the constituency and is never stored by this site.
- The “≈5,100 eligible expats per seat” figure assumes even distribution, which is not how it works in reality — expat votes concentrate where expats used to live. Treat it as a scale reference, not a prediction.
- This site is an independent information project, not affiliated with the UK Electoral Commission or GOV.UK. Always check GOV.UK for current rules before an election.