Alexanda Kotey was part of terror group cell of four Britons known for its extreme brutality
Teenager attributed early display of remorselessness to threats she faced from extremists in al-Hawl
Furore over home secretary's failure to seek assurances pair would not be executed
Alexanda Kotey and El Shafee Elsheikh detained by Syrian Kurdish fighters
Muhiddin Mire (30), attacked 56-year-old musician Lyle Zimmerman with rusty knife
British citizen Mohammed Emwazi gained notoriety for filmed execution of hostages
Video appears to show the killing of five men who Isis claims were spying for Britain
Turkey is focused on detecting Islamic State fighters crossing its border
Corbyn move to allow free vote on air strikes exposes divisions, writes Denis Staunton
The man suspected of planning the Paris attacks is a well-known face of Islamic State
Prepare, protect, pursue, prevent - the four Ps of the UK’s ‘Contest’ strategy
Killing of the British citizen called a ‘barbaric murderer’ has been broadly welcomed
Death of UK terrorist believed responsible for gruesome beheadings not yet confirmed
21-year-old was deported to Birmingham after trying to cross illegally into Syria
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