I should stick to my lane really, anyone who has followed my single sex spaces in schools topic should know I am a bloke, but.
If you were ever put off the WI previously, perhaps now, in the wake of this decision, it's the time to join and guide and hold them in this time of flux into the org that it should have been all along - and change their chairwomen whilst you are there.
Same goes for the girl guides as a volunteer or helper - go, influence them etc.
(Sorry if this is out of line, obviously not actually trying to tell anyone what to do here)