The judge sentencing Damian Rzeszowski to 30 years in jail on six counts of manslaughter said:
The horror and brutality of these killings is hard to believe.
Within a quarter of an hour all six people had died, their lives cruelly cut short.
The court is in no doubt from the nature of the attacks that you intended to kill all six victims.
This was not a case of murder - the court found you guilty of manslaughter on the grounds of diminished responsibility - but you still pose a risk of harm to anyone you are in a relationship with.
More top news
1,209 people were found guilty of 'trolling' offences in 2014 - and 155 have been jailed.
Critics are ambivalent to this year's slate of winners, who were picked in part by American directors Joel and Ethan Coen.
1.5m European citizens will miss out on the chance to vote on whether Britain stays in or quits the EU.