Kydd was in no mood for pleasantries either. “Fucking bollocks, Prime Minister,” he growled. “The shagging war’s not over till the general says it is and this fucking general is not saying that. No fucking way.” He looked contemptuously at Everage, who squirmed and writhed like a demented octopus.

Walker rolled his eyes at the Prime Minister and muttered theatrically in Kydd’s ear. “Go easy on the effing and blinding, mate. We’ve got the point.”

Kydd continued, “Sorry about the language, boss . . . Where was I? Oh yeah, the Russians may be in the Baltic states, but that doesn’t mean we leave them be. There’s no point in trying to push them out directly. Much better to whip up the insurgency to make them feel the heat, force them to move as many people and as much stuff in there as possible to try to contain it, and then punch for the jugular; somewhere they least expect it and where it’ll hurt the most. Kaliningrad looks good to me . . . and my mate Dave McKinlay, the Deputy SACEUR in NATO, tells me that they’ve already war-gamed it.”

Walker had never heard of the place, so was glad when the CDS elaborated. “That’s the former East Prussia—Königsberg. It’s a small chunk of Russia between Lithuania and Poland, surrounded by NATO territory; Poland to the south and Lithuania to its north. With Lithuania in flames and the Russians fully occupied trying to control the insurrection, that makes it much harder to defend and much more vulnerable to a surprise attack from Poland, the sea or through Lithuania.”

The Prime Minister leaned forward. “This is more like it. Go on.”

Kydd outlined a possible course of action. The insurgency across the Baltic states was rapidly getting out of control with thousands of men and women now in the forests resisting the Russians, who were discovering they had bitten off very much more than they could easily chew. Britain should support the American lead by providing the support, equipment and training the Baltics needed to enmesh the Russians ever more tightly there. As it was, GCHQ was picking up indications from Russian soldiers on social media and other sources that they were thinning out their garrison in Kaliningrad, in order to reinforce their overstretched troops in Lithuania.

Britain just happened to have a small party of infantrymen working with the Forest Brothers in Latvia, so it might be possible to get eyes on the ground in Kaliningrad. Meanwhile, it was entirely possible for Britain, America and its NATO allies to assemble a force by land, sea and in the air to hit the Russians where it would cause the most trouble for the President with his own people: Russian-owned Kaliningrad.

“Lose Kaliningrad and he’ll be seen as a failure and, in Russia, that makes him a dead man walking.”