British Prime Minister Keir Starmer did not directly address calls for his resignation during Wednesday's King's Speech debate, as Health Secretary Wes Streeting is expected to trigger a Labour leadership contest as soon as Thursday. Streeting met Starmer for less than 20 minutes in Downing Street on Wednesday, with allies telling the BBC they expect him to launch a bid requiring the support of 81 Labour MPs. More than 90 Labour lawmakers have publicly called for Starmer to resign, while over 110 have expressed support for him to remain.

King Charles III delivered the traditional throne speech at Westminster on Wednesday, outlining the Labour government's legislative priorities for the coming year, as Prime Minister Keir Starmer fought to remain in power amid a mounting leadership crisis. The ceremony, which included 37 proposed bills, was overshadowed by calls from 86 Labour MPs for Starmer's resignation following poor local election results and the resignation of four junior ministers. Starmer met with potential rival Health Secretary Wes Streeting for less than 20 minutes on Wednesday morning, fueling speculation about a leadership challenge.

First Minister Rhun ap Iorwerth on Wednesday named his ministerial team for Wales' first ever Plaid Cymru government, with Sioned Williams as deputy first minister and former presiding officer Elin Jones as finance minister. Ap Iorwerth, confirmed as first minister on Tuesday after Plaid became the largest party in the Senedd, said the cabinet represented a "wholesale" change of approach. The new government includes former Plaid leader Adam Price as enterprise minister and former Westminster MP Elfyn Llwyd as counsel general designate.

Russia on Wednesday placed former British Defense Secretary Ben Wallace on its wanted list under a criminal article, according to a document on the Interior Ministry database. The specific article was not disclosed. Russian media linked the move to Wallace's September 2025 calls for strikes on Crimea to render it “uninhabitable.”

The UK government announced on 25 March that armed forces could board sanctioned Russian shadow fleet vessels in UK waters, but between 25 March and 11 May, 184 sanctioned vessels made 238 transits through those waters with no recorded boarding. At a CEPA press briefing, experts warned that unenforced commitments undermine sanctions credibility. Mihkel Märtens, author of a new CEPA report, stated that if a government says it will act but does not, it could lead to an embarrassing situation. Benjamin Schmitt, a senior fellow at CEPA and the University of Pennsylvania, described shadow fleet vessels as 'jack of all trade hybrid threats,' citing French court proceedings involving the vessel Kivalla/Pushpa/Borekai/Phoenix, where a captain testified that unaccountable Russian security personnel from a group called Moran, allegedly including a former Wagner mercenary, were present on board collecting intelligence and monitoring the crew. Schmitt personally observed the Kivalla under Estonian Navy interdiction in Muuga Bay in April 2025 and later identified the same vessel as a suspect in the shutdown of Copenhagen Airport through drone activity in September 2025. The vessel has since been renamed Phoenix and was last seen sailing in East Asian waters toward Russia. Schmitt argued the West needs wartime-level staffing to match the scale of enforcement, warning that inconsistent enforcement provides a permissive environment for Russia to strategize.

A UK poll of over 2,000 people reveals that 15% are using AI chatbots for health advice instead of consulting a GP, with a quarter of those citing long NHS waiting lists as the reason. Doctors express concern about risks to patients from relying on AI for medical guidance.

British-German startup Hypersonica (Nightfall) successfully tested a hypersonic missile at Mach 6 (7,400 km/h) over a distance of 300 km at Andøya Spaceport in Norway. The test, completed in nine months from concept to launch, aims to develop Europe's first sovereign hypersonic strike system by 2029. The UK had previously stated such weapons could boost Ukraine's firepower. The missile's modular design aims to reduce costs by over 80% compared to traditional programs, potentially reshaping European defense procurement.

The Council on Geostrategy published a report co-authored by former MoD Director General Peter Watkins, arguing that the UK's nuclear deterrent posture is outdated and lacks a sub-strategic rung on the escalation ladder. The report recommends deepening nuclear cooperation with France, updating public doctrine, acquiring more F-35A nuclear-capable aircraft, and developing a sovereign air-launched sub-strategic nuclear weapon, with an estimated cost of £11-14 billion over 20 years. It warns that Russia's expanded non-strategic arsenal and doctrine necessitate a more flexible UK posture to maintain credible deterrence.