Jill did some demos and played a couple of gigs in the immediate period after Strawberry Switchblade split up but she's never officially released anything. She now does painting/sculpting and work on stained glass panels. I think she's still married to Julian Cope's bassist, Frog and has 1 daughter.
Rose was guest vocalist with bands like Current 93, Coil, Death in June, Psychic TV and more. In 1993 she collaborated with Boyd Rice under the name Spell, releasing 2 singles and an album.
She also formed a band called Sorrow with her then husband Robert Lee (he left in 2002 and they're now divorced). They released 2 albums/1 EP and toured Europe/US. Rose now performs under her own name.
I think she has 2 children.
The band split in 1986. They released one self titled album (also available on Japanese import with some extra tracks) and there's also a compilation CD available which contains most of their songs.
Strawberry Switchblade fansite
EDITED TO ADD: In an interview with Classic Pop magazine in 2015 Rose said she was hoping to re-release some of her old albums, complete with extra tracks.