… and it turns out he was very well known to the police. Albeit a different force.

http://news.bbc.co.uk/1/hi/uk/3313501.stm

The string of dropped rape cases makes me even more convinced the reason the CPS have chosen to omit this section of their guidance from their website is that they're embarrassed at how easy it is for rapists to avoid being put on trial, never mind found guilty.