As of the time of publication, this is how the six contenders are doing:
Keir Starmer - 68 nominations
Rebecca Long Bailey - 26 nominations
Lisa Nandy - 26 nominations
Jess Phillips - 22 nominations
Emily Thornberry - 10 nominations
Clive Lewis - 4 nominations
The candidates who reach the magic number of 22 will then go forward to the second stage.
They must get the nominations of 5% of all constituency Labour parties or three Labour affiliates – of which at least two must be trade unions – comprising at least 5% of the fully paid-up affiliate membership.
The freeze date for new members to join and be eligible to vote is January 20.
People will also be able to join as a registered supporter for a fee of £25 provided they are on the electoral register and meet the membership qualification criteria of membership of the party.
Applications to become a registered supporter open at 5pm on January 14 and close at 5pm on January 16.
The second stage of nominations from constituency parties and affiliates then opens on January 15 and runs to February 14.
The ballot of members and registered supporters opens the following week on February 21, closing at midday on Thursday April 2.
Saturday 18 January: Liverpool
Saturday 25 January: Durham
Saturday 1 February: Bristol
Sunday 2 February: Cardiff
Sunday 9 February: Birmingham
Saturday 15 February: Glasgow
Sunday 16 February: London
The result will be announced on April 4 at a special conference in London.