CSRI finds China and Russia may be coordinating ‘grey zone’ tactics against vulnerable western infrastructure

China and Russia are stepping up sabotage operations targeting undersea cables and the UK is unprepared to meet the mounting threat, according to new analysis.

A report by the China Strategic Risks Institute (CSRI) analysed 12 incidents in which national authorities had investigated alleged undersea cable sabotage between January 2021 and April 2025. Of the 10 cases in which a suspect vessel was identified, eight were directly linked to China or Russia through flag-state registration or company ownership.

Regulator acts on leasing of ‘global title’ numbers after industry efforts to tackle problem were ineffective

The UK communications regulator Ofcom is banning mobile operators from leasing numbers that can be used by criminals to intercept and divert calls and messages, including security codes sent by banks to customers.

Ofcom said it would stop the leasing of “global titles”, special types of phone numbers used by mobile networks to support services to make sure messages and calls reach the intended recipient.

Amid claims of sabotage of undersea cables, a small wooden structure houses a key cog in Europe’s digital connectivity

At the end of an unmarked path on a tiny island at the edge of Stockholm’s extensive Baltic Sea archipelago lies an inconspicuous little wooden cabin, painted a deep shade of red. Water gently laps the snow-dusted rocks, and the smell of pine fills the air.

The site offers few clues to the geopolitical drama that has gripped Scandinavia in recent months, driven by accusations of infrastructure sabotage. But in fact the cabin houses a key cog in Europe’s digital connectivity, and a point of vulnerability in a potential hybrid war: a datacentre that amplifies the signal from a 1,615-mile fibre-optic cable running from northern Sweden to Berlin.