Biggest miscalculation made by Mayday was right at the outset when she assumed office. There were many Labour Leave seats. Mayday and the Tories could have taken the decision to involve them in the process of leaving, to keep the concept non-party and win kudos and who knows more voters in the process.
However she chose to make it exclusively Tory - she could see massive gains and huge personal glory for a Tory party who triumphantly led the UK into the promised land as she saw it.
We ended up where we were last night - so she reaped what she had sown and has to take the blame.