More broadly there are government agencies that will have the authority to enter a property for jurisdictional reasons and potentially disregard our well considered food safety protocols for more eminent threats, whether that be in search of physical material or people. Drugs get hidden in things to attempt to circumvent detection, junior cyber criminals need day jobs, etc. Plenty of things can be the cause, and several agencies have enforcement powers.
Yep but it's SUCH a different mindset US vs UK. I have always had this in my procedures around access in emergencies. The mindset though in the UK is "that's likely to be an ambulance if there was an accident or someone had a heart attack" etc. The mindset in the US is very different on who those official agency staff might be employed by.
A few years back, I was at a site where an awful case happened with modern slavery. That's been my closest link with talking to police about something like this (albeit they had the right to work in the UK, they were being abused by a criminal gang sadly). No blue lights, no charging in, just informing us at the time (as the person had by that point left) and talking to us about our controls against modern slavery. Not in an accusing way, more about whether we were doing everything we could.
It must be a stressful experience planning for all of this.