So it seems that being held under Section 136 and placed in a police cell is not such an exceptional occurrence
www.bbc.co.uk/news/uk-22979198
I was held in a police cell for many hours one evening and it was one of the most scary things I have experienced. Admittedly I had been behaving a little strangely in public but I had no suicidal intent and really just needed to get home to bed.
I was picked up and told that they would take me home but then sectioned when I was in the car. I had to go through searches and a full check in at the custody suite with so many questions it made my head go even more fuzzy. I was then put in a locked cell with a cctv camera. I was alone and scared and this was so far removed from what I needed. After many hours of me sitting on the floor and crying the on-call doctor arrived to assess me. The local hospital unit was full and it was a Sunday night and he told me it would be difficult to arrange an ooh appointment with the next closest unit. He told me just to contact my CPN the next day. So I was released (!)
Back out (not taken home) I was pretty much in the same state as I was taken in but now I have a police record (albeit not criminal) that I guess will now show up in any CRB checks I have in the future.
So is this a common experience? This incident has made me nervous. If I needed help that night I certainly don't think putting me in a cell was helpful or appropriate.