Labour have had two different female leaders of the party (on three occasions), the Tories three. OK they were both interim leaders but they aren't as adverse to female leaders as your post would suggest
Also, since Thatcher / Kinnock Labour have had less Leaders than the Tories, so in the modern era (for want of a better term), they've had less opportunity to elect women leaders. (6 vs 9). Two of the female Tory leaders have been elected in the last 6 years
EDIT Also the female Leaders became Interim Leader because they were the elected Deputy Leader of the party at the time of the leader's resignation, which casts further shade on the accusation of seixism in the choice of females in the upper echelons of power in the Labour Party. The Tories don't even elect Deputy Leaders. Labour have had three elected female Deputy Leaders