Short Lists

Major political parties in Great Britain* with a male leader

Labour Party
Liberal Democrat Party

Much longer list:
Major political parties in Great Britain with a female leader

Green Party**
Plaid Cymru
SNP
Conservatives***
UKIP

* GB excludes Northern Ireland. That bastion of male chauvinism only has one major party with a female leader.

** Yes I know that technically they have two joint leaders and one is a bloke, but Caroline Lucas is the only one anybody's heard of.

*** Which gives me another idea for a short list: "European countries with a female prime minister/chancellor etc who never had children"