in Britain people are more realistic than their counterparts in the US. For example in the US there is less perception of increasing inequality while here in the UK people are more aware that the poor are becoming poorer. I really value this honestly and realistic aspect of UK life.
Apart from that most psychologists agree that religion plays a part in overcoming mild forms of depression and anxiety and they see religion as having a positive role in society. For major forms of mental illness people rely on other things than religion. Surely you are aware of this from your work in a mental health charity? They tend to fall through the cracks into drug abuse, prison, homelessness and such like. Most people in prison have/have had some form of mental illness. This is truly tragic particularly as psychologists successfully argue that mental illness exists on a spectrum of normal responses to the vicissitudes to life.