New rules will prevent terrorist prisoners leading the call to prayer or delivering sermons – positions they could exploit to spread their poisonous ideology.
And they will face more rigorous checks for extremist literature.
The Government is redoubling efforts to crackdown on dangerous radicalisers twisting minds from behind bars.
These will strengthen existing measures preventing the most dangerous prisoners leading Friday prayers.
The ban will extend to all faiths and not just those in high-security prisons – protecting frontline staff and the public.
READ MORE: Major manhunt after riot at immigration center ‘turns ugly’ with 13 fleeing
There are currently around 200 convicted terrorists in custody, many of whom attempt to justify their offenses through their flawed interpretation of religion.
The Muslim extremist jailed for life for the murder of soldier Lee Rigby converted his fellow inmates to Islam and was “looked up to” by them, a judge said.
Lawyers representing the Ministry of Justice during a compensation claim by Michael Adebolajo in 2017 gave the judge details of the influence he had in prison.
Mr Justice Langstaff commented: “He forms relationships easily.
“He is charismatic. There is intelligence suggesting that he has had some influence on the conversion to Islam of some individuals. There is a large group of people who look up to Adebolajo.”
Adebolajo demanded £25,000 compensation claiming he was injured by prison officers during an incident in a cell. He later dropped the claim.
Fusilier Rigby, 25, died after being attacked near Woolwich Barracks in south-east London in May 2013.
Adebolajo, now 38, and Michael Adebowale, 32, were convicted of murder.
Adebolajo was given a whole-life jail term and Adebowale was sentenced to life with a minimum of 45 years.
The Government has also confirmed limits on prisoners’ property that will prevent extremists from circumventing prison rules to hide and spread extremist texts.
There are currently no limits on the number of books prisoners can own, but in the future they must fit into two medium-size boxes with a maximum weight of 33lbs.
In one case an offender had more than 200 books in an apparent attempt to thwart prison officers searching for extremist material.
This week also sees construction begin on a new Close Supervision Center at HMP Frankland – a separate wing to hold the most physically violent prisoners, including terrorists, to further tackle extremist activity.
The moves build on a bolstered approach to managing terrorists in prison that began a year ago this week following an independent review by Jonathan Hall KC.
Justice Secretary Alex Chalk said: “Faith can play a vital part in prisoners’ rehabilitation but we must never tolerate terrorists who seek to exploit religious services to advance their own sinister agenda.
“These changes, alongside tougher sentences for terrorists who commit crimes behind bars and our work to separate more of the most radical terrorists, will better protect our hardworking staff, other prisoners and the public.”