I’m confused, and this article assume the reader knows what is Police CyberAlarm.
Web-searching around, I found this page, which seems to be the official product page. It looks like the product is provided by the British police. But it provides even less insight on who installs this, how does it work, what is the use-case, and why is this written in PHP?
I think the most useful thing to do would be to read the three linked articles about the story behind disclosing vulnerabilities in this system - it’s an incredible rabbit hole: