Labour has urged ministers to scrap its plans for voters to show identification at polling stations, following a trial yesterday.
There was controversy as some voters in Swindon, Woking and Bromley were reportedly prevented from voting.
Shadow Cabinet Office minister Cat Smith said: “There was absolutely no case for introducing voter ID in the first place but after yesterday’s fiasco, it is impossible for the government to justify rolling it out.
“After completely ignoring a number of serious warning signs, the government decided to pilot discriminatory measures which denied people their right to vote.
“We cannot allow the Conservative Party to undermine our democracy, which is why Labour is calling on the government to scrap their voter ID plans as a matter of urgency.”
The Cabinet Office said the pilots were a success.