Europe’s western flank is now as vulnerable as its east

UK

Subsea cables, ports, telecoms and supply chains put Britain on the frontline of hybrid warfare – and Russia is taking aim, warns the first report in Sibylline’s new UK resilience series.

RUSSIA’S invasion of Ukraine in 2022 refocussed Nato’s gaze on the east towards the Baltics, Poland and the Suwałki Gap.

But Europe’s western flank remains perilously exposed, with the UK and Ireland sitting at the centre of a growing web of hybrid pressure that policymakers have barely begun to confront.

The most fragile part of Britain’s defences isn’t hardware, however – it’s mindset.

While both Finland and Sweden possess a “whole-of-society” approach to crisis preparedness, the UK’s civilian resilience remains driven by an impression that the Russian threat can be met and conquered thousands of miles away.

A new, groundbreaking report by Sibylline identifies a series of concrete threat vectors already in motion.

These include cyber espionage against telecom providers; physical sabotage of masts and fibre links; growing interference with subsea cables; maritime intimidation and electronic jamming; and the emerging risk of unmanned surface and subsurface drones targeting ports, shipping lanes and energy infrastructure.

It also highlights pressure points across food supply chains, energy imports, water treatment systems, healthcare resilience and just-in-time logistics. All of which could be disrupted far more easily than the public assumes.

But hybrid attacks, sabotage and cyber intrusions are no longer confined to the east. They are probing the West’s soft tissues – the cables, data routes, ports and telecoms networks that underpin British and Irish life.

Recent incidents across northern Europe show how quickly the threat is shifting westward.

While the greatest threat comes from Russia, it is not alone. China is intensifying cyber-espionage and Iran is expanding proxy influence operations, including claims that Tehran’s recent internet shutdown briefly disrupted pro-Scottish independence accounts – a link analysts say cannot be dismissed.

Swedish authorities are investigating a coordinated sabotage campaign against telecom masts along the E22 highway, with cables cut and equipment destroyed.

In the Baltic Sea, at least six subsea cables were damaged between 31 December and 5 January, with two incidents linked to a Russian-associated cargo ship detained by Finland.

“The Baltic remains NATO’s eastern frontline, but the pattern of sabotage and subsea disruption there is now rippling westward into UK and Irish vulnerabilities,” says Alexander Lord, Sibylline’s lead Europe analyst and the report’s author.

These operations are quiet, deniable and persistent – and they map directly on to UK vulnerabilities.

The UK–Ireland corridor contains some of Europe’s densest clusters of fibre-optic cables, lying in shallow water where physical interference is easy to disguise. Russian reconnaissance vessels have repeatedly passed north of Scotland, through the Channel and into the Celtic Sea.

This matters because Britain’s ports – from Southampton and Portsmouth to Immingham and Tilbury – are core arteries for food, fuel, components and consumer goods.

And maritime disruption is one of the Kremlin’s most likely escalation pathways, Lord said.

“Following the seizure of the Russian-flagged vessel, the Russians will want to undermine our maritime security in a perceived reciprocal nature,” he says.

While Russia’s conventional navy has limited reach, its grey-zone capabilities do not.

Lord adds: “My concern is that they are now going to use what they’re learning in the Black Sea to use maritime drones to undermine shipping lanes, ports and undersea infrastructure.”

Even a non-explosive device could create paralysing uncertainty.

“One of the things I’m most worried about,” he says, “is quite simply an unmanned submersible or naval drone just plowing into a Rotterdam and blocking it.”

Authorities would have no way of knowing whether such a device was rigged to explode, forcing costly shutdowns and diversions.

The deeper structural problem, Lord says, is that the UK dismantled its resilience architecture after the Cold War and never rebuilt it.

Stockpiles were sold off, surge capacity removed, and critical sectors allowed to prioritise efficiency over robustness.

“We need to raise the understanding of the threats, but also the impacts to daily life to tackle the complacency across our society, and then build resilience from that.”

Steps are being taken.

A new energy resilience plan is eagerly anticipated later this year, and government is beginning to exert a firmer hand over critical industries, pushing companies away from just-in-time fragility and towards just-in-case resilience.

But many firms, especially SMEs which may struggle to absorb the impact, remain slow to adapt, unwilling or unable to grasp that post-war globalism – and the post-Cold War peace dividend – were historical exceptions, not an evolutionary step.

This complacency still extends across Whitehall, too.

Much of the political class, says Lord, still imagines that Russia can be managed at a comfortable distance.

“We feel we can tackle the Russian threat away from home,” Lord says. ” We deal with Russia over there, so it shouldn’t affect us over here.”

That belief is no longer sustainable.

“Given the leading role London has taken an influencing the West’s Ukraine policy, many policymakers in Moscow believe the UK is Russia’s primary enemy. They absolutely hate us and they think that everything bad comes from London,” he says.

“The fact is that Russia is aware of our vulnerabilities and is seeking to exploit them,”