The callout siren for Gutersloh's MQs at Harsewinkel was actually the town's Fire station siren. The locals were remarkably tolerant in view of the fact that the damned thing was often going off at all hours of the night.
The deployment kit was always either being packed, unpacked or actually in use. Some happy days, but it did all get a bit extreme at times and I'm very glad I'll never have to wear an AR5 respirator or charcoal suit again.