What does the UK elections bill set out?

Government says plan will ensure polls remain secure while critics argue it is unfair and undemocratic

The elections bill, which will be debated in the Commons for the first time on Tuesday, is, according to the government, an ambitious and timely set of plans to ensure elections remain fair and secure. To critics, it is undemocratic and intended to rig elections in favour of the Conservatives. So what does the bill set out?