[5] Cable had put a proposal to the party's Spring Conference to change the rules to allow non-MPs to seek the leadership; however, this was rejected.

[9] Party members registered before the close of nominations were able to vote via postal or electronic ballots; these were issued on 28 June and 1 July respectively.

[15] Stephen Bush, writing for the New Statesman, argued that the expected campaign issues—the legacy of the coalition and the threat of Change UK—were both largely rendered moot by the success of the Liberal Democrats in the local and European elections.

[16] Davey launched his campaign on 30 May with a focus on revoking the UK's withdrawal from the European Union and on environmental issues by "de-carbonising capitalism".

He hinted at more interest in encouraging defections to the Liberal Democrats than pacts with other parties, like Change UK.

Later that week, she said the party could be open to local electoral agreements to support other pro-Remain politicians, but that the Liberal Democrats were the "obvious rallying point" for those opposed to Brexit.

The following MPs were discussed in the media as potential leadership candidates, but they declined to stand: Ed Davey and Jo Swinson were invited to take place in a series of hustings organised by the party.