Holes mysteriously found cut in army base fences.

An alleged plot to assassinate Germany’s top weapons manufacturer.

Phone taps on a high-level Luftwaffe call. These aren’t storylines lifted from a 1960s spy novel but real-life events in Germany, this year.

Not all of these events can definitively be blamed on Moscow, but Germany is on heightened alert for possible acts of Russian sabotage, because of Berlin’s continued military support for Kyiv.

As a hot war rages between Russia and Ukraine, there are fears that Europe has slipped into a new Cold War.