The UK government said on 15 June that it would expand sanctions pressure on Russia while providing £210mn of UK Export Finance support for enriched uranium supplies to Ukraine's nuclear-power operator, Energoatom. The package, announced as G7 leaders met in Evian-les-Bains, is meant to tighten enforcement against Russia's shadow fleet and reduce Ukraine's exposure to attacks on its electricity system before another winter.
Downing Street said the finance support would enable UK-based Urenco to supply fuel to Ukrainian nuclear plants for the next two years. It also said Energoatom provides more than half of Ukraine's electricity. That makes the fuel arrangement more than a symbolic summit deliverable: in a grid repeatedly targeted by Russian strikes, nuclear generation is part of Ukraine's physical resilience.
The sanctions side is more familiar, but harder to measure. The Guardian and Politico Europe reported that Starmer was targeting Russia's oil and LNG-linked shadow fleet and associated financial networks. The Times reported that the UK intended to target more than 600 vessels, compared with 545 already sanctioned. The significance depends on whether designations are matched by enforcement against insurers, traders, flags, ship managers and ports that let sanctioned cargoes move.
Sanctions on vessels are useful only if they raise the cost of evasion. Russia has spent years routing oil through older tankers, opaque ownership chains and changing flags. Listing more ships can narrow that channel, but the effect is cumulative rather than immediate. It depends on allied coordination and on whether commercial actors decide that touching the cargo, the hull or the financing is too risky.
The UK framed the package as part of a wider effort to pressure Vladimir Putin's government and sustain Ukraine. The Guardian reported that Starmer presented the measures as a way to restrict Russian finance and energy networks. Politico Europe described the announcement as fresh energy sanctions paired with a nuclear-fuel deal for Ukraine.