Welcome to Her Majesty's Prison Service, a creaking and surreal world that has been left to rot for decades in the shadows of polite society. Like most people, documentary-maker Chris Atkins didn't spend much time thinking about prisons. But after becoming embroiled in a dodgy scheme to fund his latest film, he was sent down for five years. His new home would be HMP Wandsworth, one of the oldest, largest, and most dysfunctional prisons in Europe.