As if all those license plates weren't enough of a contribution, the prisoners of one U.K. prison will now be getting a chance to give something back: their feedback.

The police are giving inmates at the jail a 41-page questionnaire, asking them to rate their detainee experience on services such as "food and drink, reading material, safety, cleanliness, lighting, toilet and shower facilities, and exercise," and whether they'd been shown the emergency cell buzzer.

One guard groused, "They are starting to treat the emergency cell buzzer like a room service hotline ... We are getting asked all sorts -- to get them celebrity magazines, to put air con on, to bring them a salad."

The jail hopes to gain more than a "5 Shiv Rating" out of the scheme, however, viewing it as a valuable way to measure and identify best practices.

Click here to see all 41 questions.