Does Jennifer James's challenge also cover the Jo Cox Leadership Programme, or would that need a separate case? I can't remember the details without looking them up but I think that was supposed to be used to help women get the skills and confidence to take on committee posts and leadership roles in the Labour Party, as well as increasing the number of women MPs and councillors. Competition to get onto it is presumably quite intense.
One of the first hurdles to be got over is that growing up with female socialisation can make women reluctant to sing their own praises and to put themselves forward. It can make them more self-critical than men, more likely to think 'I can do 95% of that but they won't want someone who can't do 100%, and they'll be angry if I waste their time by even enquiring'. Men, of course, are far more likely to glance at a job spec and think 'I can do some of it, I can wing the rest, let's give it a punt - after all, they'd be lucky to get me!'.
Some of the places on the Jo Cox programme have gone to candidates who didn't have the female socialisation handicap.