Some of the worst tensions had been at Feltham Young Offenders Institution and Brixton Prison, both in London.

BBC: New gangs forming in jails after riots, watchdog warns

Dr Alexander was accused of prescribing lethal doses of methadone, the heroin substitute, to two inmates at Brixton Prison in 1994.

BBC: News | Health | Prison doctor struck off over inmates' deaths

Mr Bethell, who has repeatedly been arrested for his nudity, has spent the last five months in solitary confinement at south London's Brixton Prison because of his refusal to wear clothes.

BBC: Vincent Bethell

New documents, released by the National Archive in Kew, reveal the full story of how Nicholas was arrested, and why he had to spend four months in Brixton prison, where Moseley and other fascists were imprisoned.

BBC: NEWS | UK | Wales | Secrets of jailed rebel exposed