But that was old Coop. I'm not really sure in regular employment terms you can do that.
again, i'm starting from the perspective of not being a woman, so can't offer any direct first hand thoughts
to the best of my knowledge, UK equalities law generally prohibits 'positive discrimination' (not to be confused with 'genuine occupational qualification') so i'm inclined to think (subject to the usual disclaimers) that advertising a post for 'women only' would be legally on a par with advertising for 'men only' even if the motive is to try and get a more balanced workforce.
although there is a concept of 'positive action' which isn't illegal - don't know a lot about it -
this was about the first thing i could find on the subject, and may be worth further research here.
I have certainly seen job adverts that aim to encourage women applying for what is traditionally seen as a 'mans job'- some less cringingly awful than others. (e.g. the operational end of the transport business - some trying to tackle ideas that might put women off applying, like saying that the physical effort involved in driving a modern bus is no more than in driving a car)
It also used to be the case that some employers would place job adverts in papers like the 'voice' (black community) and / or the 'pink paper' (LGBT community) as well as mainstream press, but not sure that's so easy when it comes to seeking women for jobs, or in a more digital age.
TFL's page on women in transport may be worth a look.
We've had people from outside who seemed promising based on their CV, but who faltered at interview (almost entirely male applicants in this case too).
does the job advert make what you're looking for / what the job is about clear enough? I've been after one or two jobs in the past where it's not been what i'd thought and i wished i hadn't bothered - and quite probably the feeling was mutual (the age of 'phone for informal chat before applying' seems largely dead, but probably wastes more time than it saves in the long run)
alternatively, if it's a rare job, should your organisation be thinking about training people who might not have all the 'right' experience?