Small British wizarding prisons

A number of small wizarding prisons existed throughout Great Britain in various towns and villages, and were used for the incarceration of various criminals. After the passage of the International Statute of Wizarding Secrecy in 1692, these prisons were felt to be too risky due to the magical commotion caused by criminals attempting to escape. Plans were therefore made to replace these prisons with a single, remote incarceration facility, originally planned to be constructed in the Hebrides but eventually consisting of a re-purposed Azkaban.

Behind the scenes

 * Assuming he was British, Ethelred the Ever-Ready would have been incarcerated in one of these prisons.