The types of information processed includes names, dates of birth, gender and ethnicity, and a number that identifies people on the police national computer.
Also to be shared – and listed under “special categories of personal data” - are “health markers which are expected to have significant predictive power”, such as data relating to mental health, addiction, suicide and vulnerability, and self-harm, as well as disability.
There are around 600 homicides every year in the UK. The population is over 68 million. I feel like I could already give a pretty good estimate of whether a given person is going to be a murderer.