http://www.bbc.com/news/uk-44097196
The 72-year-old was jailed for life in 1983, with a recommendation he serve at least 25 years.
The former civil servant murdered and dismembered several of his victims, most of them homeless young gay men, at his home in Muswell Hill, north London.
He was convicted of six counts of murder and two of attempted murder.
The Prison Service said Nilsen, who was born in Fraserburgh in Aberdeenshire, died at HMP Full Sutton near York.
The death of Nilsen will be investigated by the Prisons and Probation Ombudsman, as is normal for custody deaths, a spokesman added.
Nilsen was 37 when he was arrested, after human remains were found in a blocked drain at his home.
He and other tenants in his block of flats had complained to the landlord about the smell from the drains. An inspection by a plumber found pipes packed with human flesh.
[....]
He met his victims, all of them men, in a pub and he would take them back to his flat for a drink. Most were homeless, some were homosexuals and some were prostitutes.
His trial heard how Nilsen strangled many of his victims with a tie and then disposed of the bodies, either through hiding them under the floorboards or by cutting up the body and flushing parts down the toilet.
On many occasions, he would sit with their bodies for days before he dismembered them.
Nilsen admitted killing at least 15 people, but he was convicted of the murders of six men:
There were others who survived.
- Kenneth James Ockenden
- Martyn Brandon Duffey
- William David Sutherland
- Malcolm Barlow
- John Peter Howlett
- Stephen Neil Sinclair
Mr Nilsen spent 11 years in the Army, with some time spent in the catering corps where he learned certain butchery skills.
He later served briefly as a probationary police constable before becoming a security officer with the Manpower Services Commission in 1974.
