Just two ballots were submitted at one polling station in Cardiff South and Penarth, according to the returning officer at the by-election count.
The majority of ballot boxes from around the constituency are now collected at the Sport Wales National Centre, where the count is taking place, with initial indications of a turnout below 30%.
The returning officer says he thinks the November date is 'a significant issue', but also puts it down to a 'drag effect' from apathy around the Police and Crime Commissioner election, and 'electoral fatigue' after the local elections earlier this year.
Stephen Doughty will be the new MP. He's increased Labour's majority slightly, but turnout was just 25%.
Counting begins to find out who voters in Wales' biggest constituency by population have chosen as their new MP.
It's the final day of campaigning before the Cardiff South and Penarth by-election.