There has been a heartfelt plea for change as hundreds gathered in Plymouth to pay their respects to the five people killed in one of the UK’s worst mass shootings. Civic leaders, religious figures, politicians, emergency service workers, and the military joined around 200 people outside the Guildhall in Plymouth city centre to hold a one minute’s silence. They gathered to mourn and reflect on last week’s devastating events when gunman Jake Davison, 22, launched his murderous spree in the Keyham area of the city. Davison shot his 51-year-old mother Maxine Davison, also known as Maxine Chapman, at a house in Biddick Drive before he went into the street and shot dead Sophie Martyn, aged three, and her father, Lee Martyn, 43. In the 12-minute attack, Davison then killed Stephen Washington, 59, in a nearby park before shooting 66-year-old Kate Shepherd, who later died at Derriford Hospital. Addressing the mourners …