This highlights the kind of issues that the police have to deal with. They aren't perfect but they deserve more respect than they get.
However, to focus on your point, I'm probably missing something here but I can't see anywhere that this man is a foreign national. In the sentencing report, there is no recommendation for deportation action to be taken which would be the norm in such cases. Is he someone who is subject to control under the Immigration Act? He could just as easily be a British Citizen from what I have read. Grateful if you could clarify this.