But then the geekery really started. This is in a loft, accessed through a hatch. So I've used an electromagnet designed for locking a driveway gate (600kg of holding force), and hidden a key operated switch behind a coat rack. I also had some bits lying around the workshop - a PIR sensor and some sirens that are so high pitched and intense, you can't be in the same room as them. So I've wired those up too. If someone gets round the magnetic lock, it triggers the sensor and the sirens go off. I considered using some of my vape kit to make a smoke machine that will fill the loft with thick foul smelling smoke too. But then figured that might be overkill

Unfortunately, in reality, I was a bit disappointed at how quickly the police guy was satisfied. He saw it, gave it a hefty shove and said "yeah, that's not going anywhere". I was like "but but but, don't you want to see how I've protected the bolts, and the grade of PU bonding I've used, and.....". I was tempted to offer him a crowbar and tell him to try his worst!
He called me an anorak, so, I guess, job done
