As I said he had absolutely no evidence or information about when the depression began.
Glorianny, you don't know that. He had seen the psychiatrist reports, the pre-sentencing reports and other sources of information and came to the conclusion that "You were not suffering from any serious mental illness at the time of this offence." Surely this gives some indication that he did in fact have some evidence and information.
As for the services in prison, we are all aware of how they are lacking and have been for years. It isn't just women who face this problem. 35 years ago, it was just the same for men. My ex, who had committed fairly low level crime in moments of hopelessness, was under psychiatric care but all that stopped the moment he was convicted. By the time he left prison, all thoughts of returning to psychiatric care was blown out of the water so the moment of intervention for was lost forever. Whilst I wouldn't want psychiatric treatment used as a "get out of jail free card", sadly, there are so many people who could be served better by treatment than imprisonment but I suspect it will never happen due to the cost.