Who could vote in Labour leadership contest?
Labour Party members, affiliated trade union supporters and so-called registered supporters were able to vote, although there are some key differences from the 2015 contest which Jeremy Corbyn won.
Labour Party members needed to have signed up on or before 12 January to be eligible to vote. At least 130,000 people became members in the wake of the EU referendum. They were not able to vote unless they also paid to become a registered supporter
Anyone wanting to become a registered supporter - giving them a one-off vote - needed to pay £25 and "share" Labour's aims and values. There was a two-day window for people to sign up, which ended at 17:00 BST on 20 July
Registered supporters who paid £3 to vote in last year's leadership election had to register again and pay the higher amount to be eligible to vote
Affiliated trade union or socialist society supporters could sign up for less than £25, with rates depending on the organisation they belong to, but they had to have joined an affiliated organisation before 12 January, and then needed to register before 8 August