The mass shooting in Plymouth is the first in Britain for more than a decade.
The incident on Thursday in which Jake Davison killed five people before killing himself is said to be the first involving an active shooter for 11 years.
In 2010, taxi driver Derrick Bird killed 12 people in Cumbria and injured 11 others before taking his own life.
On June 2, Bird set off to kill those he thought had wronged him and would go on to take many more lives at random.
Armed with two licensed guns, Bird left his home at Rowrah in the early hours of the morning and drove to nearby Lamplugh where he shot dead his twin brother David.
At around 5:15am, he then travelled to the village of Frizington where he killed family solicitor Kevin Commons. Bird wrongly suspected the two had been plotting to send him to prison for tax evasion.
By around 12.15pm, having abandoned his damaged car, he took his own life in an area of woodland after his killing spree.
Still described as one of the deadliest mass shootings in British history is the Dunblane massacre in March 1996, when Thomas Hamilton shot dead 16 pupils and a teacher at a Scottish primary school, as well as injuring 15 others, before killing himself.
Prior to that there was the Hungerford massacre, a series of random shootings in the Berkshire town in August 1987, when 27-year-old Michael Robert Ryan shot dead 16 people, including an unarmed police officer and his own mother, before shooting himself.
Mass shootings tend to be defined as involving multiple targets and locations and are generally thought to involve three or more fatalities not including the gunman.
Another recent high-profile shooting prompted the 2010 Northumbria Police manhunt of Raoul Moat, which happened just a month after Bird's shooting.
Watch the ITV News report from July 10, 2010
In the early hours of July 3, 2010, he targeted his ex-girlfriend Samantha Stobbart, leaving her with life-changing injuries and killing her partner Christopher Brown.
On July 4, Moat, who is said to have had a grudge against the police because Ms Stobart lied about being in a relationship with an officer, shot and permanently blinded Pc David Rathband, who was sat in his patrol car.
Pc Rathband, who took his own life in 2012, was targeted randomly because he was an officer, but it was later discovered that he had a previous encounter with Moat in an unrelated matter.
Moat shot himself after being cornered by armed police while negotiators tried to get him to put down his weapon.