Hendon

Hendon was a place where Gwen Cooper trained to be a police officer. She quoted her old tutor as saying "there's no substitute for bodies on the ground". (PROSE: Slow Decay)

Behind the scenes
In the real world, Hendon is a police college in the London borough of the same name. Although it's official name is Hendon Police College, it is known by those within the police service simply as "Hendon".