Has it been made harder to register to vote?
5 February 2016 Last updated at 13:27 GMT
Labour claims that 800,000 people have dropped off the electoral register since the government introduced changes to the way that people can sign up to vote.
In the past, the head of a household could register all eligible voters living in a property. Now, voters have to register individually.
And there are also concerns over the obstacles faced by those with disabilities, as Giles Dilnot reports.