The former police officer joined fellow contestants Jess Impiazzi, Ashley James and Amanda Barrie in the Celebrity Big Brother house on Tuesday, but why is Maggie famous? Who is Margaret Oliver? Maggie Oliver is 62-years-old, and is a former detective constable for Greater Manchester Police (GMP). She was a key figure in the investigation into the Rochdale grooming scandal. Maggie is from Manchester and has four children. PICSELECT. Celebrity Big Brother 2018 star Maggie Oliver helped to expose the Rochdale grooming scandal Related articles