From experience in Border Control and Military, it's a double-edge-knife. You can cold-call/email HR, etc. and keep in mind, that at the very same time you wil

From experience in Border Control and Military, it's a double-edge-knife. You can cold-call/email HR, etc. and keep in mind, that at the very same time you will be added to the 'sus' list (I think this is how younger people would call it). Every country's Military has storage(s) all over (from fuel to weapons), mega-big corporations also hire physical pen-testers (which companies provide this service - look it up and send them a CV). Since you are in the UK, I remember one time I lost my keys and I had to pay 200 pounds for someone to come over, break-in and open my door. How about you do this as a side-gig? 200 pounds for 30mins of work is not a bad idea (assuming you work in your area and won't have to spend hours traveling to other towns)