Counter-terrorism policy
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No 10 repeats Rudd's call for authorities to access encrypted messagesDowning Street backs home secretary’s call for agencies to have access to WhatsApp and other encrypted messaging apps
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Laptop ban on planes came after plot to put explosives in iPadFailed attacks using shoes and underwear led to new attempts with electronic devices, security source reveals
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The Westminster attack shows the new challenges facing UK counter-terrorismThe trend towards the easily accessible, low-cost methods seen in London, Nice and Berlin makes preventing attacks ever more difficult
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Police unravel multiple aliases of Westminster terrorist Khalid MasoodThe 52-year-old Kent-born attacker had been convicted of violent offences and may have been a late convert to Islam
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Westminster attack: 75-year-old man becomes fourth victim – as it happenedPolice name Khalid Masood, 52, born in Kent as man responsible for attack in which three victims have died and seven more are critically injured
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MPs raise concerns about parliamentary security after attackMet review of Palace of Westminster will focus on Carriage Gates, where terrorist fatally stabbed PC Keith Palmer
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The day after the attack in Westminster - in picturesPolice patrols and forensic officers scour area around the Houses of Parliament as tributes are left for the victims
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Time for a declaration of war – on happinessLetters: Pointless wars | Nuclear weapons ban treaty | Boris Johnson’s hair | Fish | Guardian merchandise | Naked statues | First class
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To defeat terrorists we have to get inside their mindsWe must steer away from ill-informed rhetoric. Knowing terrorists’ life stories can be key to countering their warped justification for taking up arms
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EU taskforce highlights security failings that facilitated terror attacksLeaked report suggests need to enhance Schengen area security, raising possibility of internal border police checks
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Islamic State fighters returning to UK 'pose huge challenge'Security officials prepare as likely Isis defeats in Iraq and Syria are expected to prompt the arrival of ‘deeply indoctrinated’ UK nationals
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UK can strip terror suspects of citizenship, European judges ruleHuman rights court rejects claim by Sudan-born man who was barred from returning to UK under Theresa May’s policy
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UK police have thwarted Paris-style terror plots, top officer saysMark Rowley, Britain’s most senior counter-terrorism officer, says 13 planned attacks were stopped since 2013 Lee Rigby murder
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Police urge public to help counter UK's complex terror threatAs convictions for Islamist extremism offences rise, top counter-terrorism officer says public central to fighting future threats
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Don't threaten to cut intelligence ties in Brexit talks, UK warnedBritish MEP says it is not feasible to threaten to withdraw security cooperation following veiled warnings from Theresa May
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UK faces terror threat from Isis 'not seen since IRA bombings'New terror chief Max Hill warns Isis is planning indiscriminate attacks on civilians in British cities
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Stoke and Copeland byelections voters go to the polls - as it happenedRolling coverage of the day’s political developments as they happen
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Ben Wallace twitched uneasily as he stood in for Amber Rudd to answer questions about the alleged suicide bomberSecurity minister tries very hard to say nothing about Jamal al-Harith
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Minister says he cannot reveal details about 'British suicide bomber'Ben Wallace answers question on former Guantánamo Bay detainee Jamal al-Harith, who apparently blew himself up in Iraq
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Leading terror trial QC to be counter-terror laws watchdogMax Hill, who prosecuted in ricin conspiracy case and trial of 21 July 2005 bombers, replaces David Anderson
The Guardian view on counter-terrorism: strong encryption makes us all safer