Just heard about this review which makes for some reassuring news:
Reported in various places including here
"The decision to abandon a prosecution because of the victim's mental instability involved a misapplication of the Code for Crown Prosecutors, was irrational and was a violation of the victim's rights under art 3 of the Convention for the Protection of Human Rights and Fundamental Freedoms."
Its about B who had a history of psychotic illness - so the CPS decided B couldn't be put before a jury.
I've met with Jim and his colleagues again for another interesting chat about how to take things forward.
He gave me some information about lay visitors and I wonder if this is something more of us should get involved in? They're independent members of the local community who visit police stations unannounced to check on the welfare of people who are in police custody.