Background: Ann Widdecombe, a former Conservative minister and Reform UK politician, was found dead at her home in Devon with serious injuries; a 26-year-old man was initially arrested on suspicion of murder but police did not treat it as terrorism. Counterterrorism police have since taken over the investigation after new information and evidence emerged. The suspect, a 28-year-old white British man from Rotherham, was rearrested on suspicion of commission, preparation or instigation of acts of terrorism, having previously been arrested on suspicion of murder on Saturday and released before being rearrested. Home Secretary Shabana Mahmood confirmed a terrorist motive is now being considered, marking a significant shift from the initial assessment. Mahmood told Parliament the suspect was not known to the Prevent counter-extremism program. She offered Reform UK leader Nigel Farage a meeting with the chair of the Royal and VIP Executive Committee (RAVEC) to discuss security concerns. In the Commons, MPs debated online hate, social media accountability, and the need to protect MPs' private addresses. Mahmood said she would consider providing security guidance for former MPs and review lessons from the murder of MP David Amess. Police released CCTV footage showing the suspect in Rotherham hours before the attack, with a long object protruding from his pocket. A neighbor described armed police raiding the suspect's home. Police have received over 120 reports from the public. Police are pursuing multiple lines of inquiry to establish the motivation for the attack.

British counter-terrorism police arrested 12 individuals, including three on suspicion of conspiracy to murder, in connection with an alleged extreme right-wing plot to attack the UK Ijtima Islamic gathering at Shrubland Hall in Suffolk. The event, attended by 15,000 people, was closed early as a precaution. Arrests were made across multiple locations including Greater Manchester, London, Essex, Ipswich, and Surrey. Home Secretary Shabana Mahmood stated the police response saved lives. The investigation is classified as right-wing terrorism related.

The UK Ministry of Defence had previously announced a shift to a hybrid fleet of crewed command ships and uncrewed platforms under the Defence Investment Plan, replacing the Type 83 destroyer and Type 32 frigate programmes with six Common Combat Vessels and a family of uncrewed platforms (Types 91-94). In a new development, the MOD has now committed at least £1.5 billion over four years to deliver the Hybrid Navy, with a prototype uncrewed missile platform (Type 91) and extra-large uncrewed underwater vehicles (Type 93) aiming to enter Royal Navy service by 2030. The funding is higher than the previously referenced £1 billion, and the breakdown between vessel types will be determined in consultation with industry. Payloads for the underwater vehicles will be developed through AUKUS Pillar 2. The 2030 milestone provides the first firm near-term marker for the hybrid fleet, ahead of the six Common Combat Vessels intended to replace Type 45 destroyers from the mid-2030s. Industry is already progressing, with the MOD seeking missile silos capable of 30 days unattended operation and Navantia UK stating its Appledore yard could build two large autonomous vessels per year.

Researchers from Imperial College London, the Met Office, and the London School of Hygiene and Tropical Medicine estimate that over 2,700 people may have died from heat-related causes during the exceptional May and June heatwaves in England and Wales. The June heatwave was the warmest on record in England, with temperatures reaching 37.7°C in Norfolk. The study highlights the role of human-induced climate change in intensifying the heat dome that caused the extreme temperatures, adding 3–4°C to the maximum temperatures. Most deaths occurred in June, with around 550 estimated in May and nearly 2,200 in June. The researchers warn that heat-related deaths in northern Europe could rival cold-related ones within decades if emissions are not cut.

On 15 July, the 118-year-old border fence between Gibraltar and Spain will be removed, allowing free movement of people and goods. This follows a post-Brexit agreement aligning Gibraltar with the EU customs union and Schengen zone. The deal ends years of uncertainty for the British Overseas Territory and is expected to boost the local economy, particularly in the deprived Spanish border town of La Línea de la Concepción. Goods sold in Gibraltar must now comply with EU regulations, and a new transaction tax will replace import duties.

Background: The UK Defence Investment Plan previously replaced the Type 83 destroyer and Type 32 frigate programmes with six Common Combat Vessels and a family of uncrewed platforms (Types 91-94). New development: On 10 July, the MoD formally cancelled the Type 83 destroyer programme, confirming in parliamentary answers that classified analysis concluded a hybrid fleet of six crewed Common Combat Vessels and uncrewed Type 91 (missile) and Type 94 (sensor) platforms would deliver greater missile capacity and fleet mass at lower cost. The decision leaves open the possibility of extending the Type 45 destroyers' service life, with a final decision on life extension deferred to 2027-28 pending transition planning with industry. The MoD stated that no build decisions had been made for the Type 83, and that Scottish shipyards will instead benefit from ongoing Type 26 and Type 31 frigate construction and potential work on the new uncrewed vessels, though build locations for the Type 9x platforms have not been announced.

The European Union and the United Kingdom imposed coordinated sanctions on Russian military intelligence officers, hackers, and private companies for a yearslong cyberespionage campaign targeting European governments and critical infrastructure. The EU sanctioned nine individuals and four entities, including the 16th Center of Russia's FSB and GRU officer Yevgeny Bashev and his company Impuls. Britain sanctioned 24 individuals and entities, including senior GRU officials. The sanctions include asset freezes and travel bans. France, Germany, Poland, and other EU states were targeted. Germany summoned Russia's ambassador, and France did the same. France publicly attributed the cyber campaign to Russia's FSB 16th Center and its unit 61420, specifically targeting French military and diplomatic networks. France announced sanctions against nine Russian individuals and four organizations. The EU Council imposed sanctions against GRU officers, cybercriminals, and entities linked to Russian cyberattacks, including an FSB center responsible for infiltrating government networks and sabotaging critical infrastructure. The UK also imposed sanctions on 24 individuals and organizations, accusing Russia of a cyberattack on Poland's power grid that could have cut power to 500,000 citizens in winter. Russia retaliated by summoning the German ambassador. The coordinated action aims to counter Russian destabilization efforts and hybrid threats against EU member states.

UK Home Secretary Shabana Mahmood will outline legal measures to deport Shabir Ahmed, the ringleader of a Rochdale child sexual exploitation gang, who was released from prison. Ahmed was stripped of British citizenship but cannot currently be deported due to a 1971 law protecting certain Commonwealth citizens. The case has sparked a diplomatic dispute with Pakistan, which is reportedly unwilling to accept him. The government is considering legislative changes or emergency measures.