A memorial service and procession has taken place for police sergeant Matt Ratana who was shot dead inside a police custody facility in London last September. <br /> <br />It was attended by Ratana's widow, London Mayor Sadiq Khan, Home Secretary Priti Patel and Metropolitan Police Commissioner Cressida Dick, among others. Report by Lewisl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
