Ukraine's SBU obliterates a $400m Russian Varshavyanka-class submarine in Crimea using a 'sea baby' drone. The attack marks a historic naval blow amid ongoing peace talks. Read the full report.
A 1918 German U-boat attack on survivors of a Canadian hospital ship set a crucial legal precedent. Discover the landmark case still cited in modern war crimes law.
The UK unveils its Atlantic Bastion programme, a £14m AI and autonomous vehicle project to protect critical undersea infrastructure from Russian threats. Read the full details.
A Russian drone strike has compromised the main protective shield at Chernobyl, the UN's nuclear watchdog confirms. Radiation levels remain stable, but urgent repairs are needed. Read the latest.
A sharp new cartoon by Nicola Jennings skewers the controversial dealings between Donald Trump and Vladimir Putin over Ukraine. See the full artwork and our analysis here.
The Right Rev Thomas McMahon, Bishop of Brentwood for 38 years and a tireless campaigner for nuclear disarmament and social justice, has died aged 88. Read about his remarkable legacy.
Analysis: Russia's economy is faltering as the war in Ukraine drains resources. With inflation soaring and energy income plummeting, could internal tensions lead to Putin's downfall?
Sweden's navy encounters Russian submarines almost weekly in the Baltic, with fears of increased activity post-Ukraine ceasefire. Read the latest on regional security.
A €1.5bn protective shield over Chornobyl is no longer containing radiation after a drone strike, the IAEA confirms. Urgent repairs are needed for long-term safety.
European leaders warn a second Trump presidency could halt US aid to Ukraine, emboldening Putin and forcing a radical EU defence rethink. Read the urgent analysis.
Vladimir Putin assures India of continued oil supply, defying US sanctions. The leaders affirm a "resilient" partnership and sign new defence and trade deals.
Russian President Vladimir Putin arrives in India for high-stakes trade talks, aiming to protect bilateral defence and energy ties from Western sanctions over Ukraine. Read the latest analysis.
Vladimir Putin visits India for talks with Narendra Modi, focusing on defence and energy. The summit occurs as the US pressures India to cut Russian trade. Get the latest analysis.
Defence officials admit US Virginia-class submarines visiting under Aukus could carry nuclear warheads, contradicting earlier government assurances. Explore the legal and strategic implications.
Irish Navy reported up to five drones near the Ukrainian President's aircraft during his state visit. Get the latest on the security alert and wider Ukraine war developments.
Vladimir Putin threatens military action if Ukraine doesn't withdraw from Donbas, casting doubt on Trump's peace efforts. Read the latest on the stalled negotiations.
As the UK imposes new sanctions, analysis suggests Vladimir Putin remains unmoved and more aggressive than ever. Europe faces a moment of reckoning over Ukraine support. Read the full report.
Skydiving instructors across the UK are staging an unprecedented strike today, halting operations at major tourism sites. Meanwhile, the government receives a crucial US review on the Aukus submarine pact. Follow our live blog for the latest updates.
Analysis: As Russia's war enters a fourth year, Europe's sanctions and rhetoric are no match for solid financial support. With US backing withdrawn, a moment of reckoning approaches. Read the full report.
Guardian's former environment correspondent Paul Brown issues a powerful final warning on political failure over climate crisis. Experts echo his call for urgent action.
Vladimir Putin's secret daughter, Luiza Rozova, expressed regret for her father's war when confronted by a Ukrainian journalist in Paris. Read the full story of the emotional encounter.
A public inquiry finds Vladimir Putin morally responsible for the death of Dawn Sturgess, poisoned by novichok discarded by Russian agents in Salisbury. Read the full report.
Vladimir Putin describes Ukraine peace talks as 'difficult', while Donald Trump suggests a deal is possible. EU leaders debate using frozen Russian assets as the path forward remains unclear.
Vladimir Putin's visit to India for talks with Narendra Modi signals a crucial realignment. We analyse the high-stakes summit, its impact on US relations, and the shadow of China.
Putin and Trump's envoy fail to agree on Ukraine peace terms. Analysis reveals Europe's crucial but unsustainable role in blocking a deal favouring Russia. Read the full breakdown.
Vladimir Putin is now the main barrier to a Ukraine peace agreement after rejecting the latest US proposal. Analysis reveals the Kremlin's uncompromising stance on territory and Kyiv's future.
Vladimir Putin has halted progress on a US-brokered Ukraine peace deal and declared Russia is 'ready for war' with Europe. Get the latest analysis from Kyiv.
High-stakes Moscow talks between the US and Russia yield no breakthrough on Ukraine. Putin issues stark war warning to Europe as NATO ministers convene in Brussels.
Russian President Vladimir Putin accuses Europe of hindering peace. FIFA scales back dynamic pricing for 2026 World Cup tickets. Plus, the definitive best Christmas film is named. Get the day's top stories in our concise news roundup.
US-brokered peace talks between Russia and Ukraine hit a wall as Vladimir Putin refuses compromise. Analysis reveals the Kremlin's strategy and the controversial role of Trump's envoy.