Story : TV presenter and model Katie Piper, Loose Women panellist Penny Lancaster, Made in Chelsea's Jamie Laing, Gogglebox's Sandi Bogle and comedian Marcus Brigstocke volunteer as special constables with Cambridgeshire police force. They respond to real 999 calls and work in custody and CID, as well as take part in high-risk drug raids and keep order in rowdy city centres at the weekend.