A terrorist who plotted a bomb or ricin attack has had his jail term increased to at least 21 years following a sentencing "error".
Munir Hassan Mohammed, who worked in a factory in Derby, planned to carry out a "lone wolf" mission in a Facebook chat with an Islamic State commander.
He sought out pharmacist Rowaida El-Hassan on a dating site and drew on her knowledge of chemicals needed to make a bomb.
The pair were were jailed for preparing terrorist acts between November 2015 and December 2016.
Mohammed was initially given life sentence with a minimum 14 years. El-Hassan was jailed for 12 years plus five years on extended licence.
Mohammed's case returned to the Old Bailey on Wednesday under the "slip rule" to correct his sentence.
Judge Topolski told the court he had received a note from the prosecution querying his decision on Mohammed.
For a "level two" offence of preparing acts of terrorism, recent guidance has set the range of between 21 and 30 years for a life sentence
Judge Topolski apologised for making an error and raising the minimum term to 21 years.
The judge said it was "appropriate" to correct the minimum term, taking into account all the circumstances of the case.
Speaking halting English in the dock, Mohammed angrily ranted for some minutes before the judge stopped the hearing.