Fifty terrorist prisoners must now serve at least two-thirds of their prison term before they are considered eligible for release.
Emergency new laws set out to prevent the automatic release of terrorist prisoners has now become law just two days before the latest extremist terrorist offender was due for release.
The government pushed through the Terrorist Offenders (Restriction of Early Release) Bill through parliament, after two former terrorist prisoners went on to launch attacks in London within two months of each other recently.
The new laws will affect around 50 current prisoners who were due for automatic release halfway through their sentences.
The changes to the pushed through new will make sure they now serve at least two-thirds of their prison term before they are even considered eligible for release.
Before being freed, they will now also need to pass a review by a panel of specialist judges and psychiatrists at the Parole Board.
Sunderland shopkeeper Mohammed Zahir Khan, who was jailed for four-and-a-half years in May 2018, was due for release on 28 February but will under the new laws remain in jail.