Labour candidate Mark Harrison has expressed his outrage at a mix up by Lambeth Council which resulted in 26 people being issued with the wrong ballot papers on Thursday morning.
A printing error meant ballot papers for Prince's ward instead listed candidates for a local election in Hackney.
Voters expressed their confusion to the presiding officer but were dismissed and told they had no choice but to cast their ballot. Only when candidate Mark Harrison went to vote and pointed out the ballot paper was wrong did the presiding officer act to sort out the situation.
The 26 people who cast invalid ballots were contacted by the Council and invited to cast their vote a second time.
Mark said 'I'm most angry that the presiding officer refused to listen to voters who told him there was a problem. Had my neighbour not alerted me to the problem within minutes many more people could have been disenfranchised. I will be making an official complaint about the conduct of this presiding officer, which disgraces Lambeth Council.'
The BBC picked up on this story on election day - read more here