Russia is intensifying its hybrid warfare campaign against the United Kingdom and Europe, targeting critical infrastructure, democratic institutions, supply chains, and public confidence, the head of the UK’s signals intelligence agency said in a landmark address on Tuesday.

GCHQ Director Anne Keast-Butler delivered the inaugural GCHQ annual lecture at Bletchley Park, the historic base of British wartime codebreaking. In her speech, she emphasized that Moscow’s efforts represent a significant escalation in daily hostile activity, which includes cyberattacks and sabotage. “Russia is scaling up its daily hybrid activity against the UK and Europe,” Keast-Butler said, noting the agency’s ongoing work with partners to disrupt Russian attempts to smuggle Western technology, defend against cyber intrusions, and counter sabotage and assassination efforts.

The warnings come amid heightened concern over Russian military and intelligence operations targeting UK interests. Last month, Defence Secretary John Healey highlighted the presence of Russian submarines near vulnerable undersea infrastructure in British waters. Similarly, Polish officials earlier linked an attack on their national power grid to Russia’s Federal Security Service (FSB), underscoring the transnational nature of Moscow’s cyber and hybrid warfare tactics.

Earlier this year, the UK’s National Cyber Security Centre, a component of GCHQ, identified hostile states including Russia, China, and Iran as the principal actors behind the majority of significant cyberattacks against Britain.

Keast-Butler also addressed Russia’s ongoing military setbacks in Ukraine, attributing these in part to British military and intelligence support for Kyiv’s defenses. She described Russian President Vladimir Putin as “going backwards on the battlefield,” reflecting the broader challenges facing Moscow in the conflict.

The inaugural GCHQ lecture also marked the 80th anniversary of the UKUSA intelligence agreement, originally formed between the United Kingdom and the United States during the early Cold War period. This pact eventually expanded to include Australia, Canada, and New Zealand, creating what is now known as the Five Eyes intelligence alliance.

The event occurs amid some strain in the "Special Relationship" between the UK and the United States. Recent public criticisms by former US President Donald Trump of British leadership and military capabilities, including disparaging remarks about the Royal Navy’s aircraft carriers and UK support for US and Israeli actions against Iran, have highlighted tensions. Trump notably referred to the UK as a “once great ally,” underscoring ongoing challenges in transatlantic cooperation.

Keast-Butler’s speech underlined the critical role of intelligence collaboration in responding to vigilant, multifaceted threats from state actors at a time of geopolitical uncertainty.