There are a lot of different roles inside a Prison. Worked as an Admin Officer myself for 12 years. Never came across any staff with type 1 diabetes, but then again I never asked. I would keep trying for an Officers job, but if you are turned down asked them about other roles in the service.
ACTUALLY on second thoughts you will probably be refused if you are injecting insulin as you would not be allowed to take your kit behind the walls. Sorry to put a mocker on you.
Lol, oddly enough. I used to work for secure document destruction company. Shredding onsite.
One of our jobs was a "purge" in a women's prison.. On the gate my colleague & I had to submit our phones, to be reclaimed on exit. We were escorted to a compound holding the paperwork in an outbuilding, which was inside another fenced off compound area...
Probably one of the most uncomfortable experiences I ever had.. It was like working in a shark cage.!
Strangely, on sign in. I was never asked if I carried any needles...