• Female prison officer, 46, admits to performing sex act on an inmate
• President Trump and Melania light National Christmas Tree in dazzling ceremony with touching tribute
• BBC Question Time crowd gasp as Reform UK's Zia Yusuf branded 'typically rude'
• Police plan to use draconian cameras that read emotions to help identify criminals and prevent suicides
• Volcanic eruption may have caused Europe's Black Death plague, scientists say