(BBC) An inmate suspected of attacking an officer at a maximum security prison was jailed for planning to behead a soldier, the BBC has learned.
He is understood to be Brusthom Ziamani, 24, who was found guilty of preparing an act of terrorism in 2015.
The attack at HMP Whitemoor in Cambridgeshire on Thursday, in which four other prison staff were injured, happened as cells were unlocked.
One officer was slashed and stabbed, the others had rushed to help.
Ziamani was assisted by another prisoner, a Muslim convert who was serving time for a violent offence.
Both inmates were wielding bladed weapons and wearing fake suicide vests during the attack.
