Its ambitions are to disrupt Britain’s politics, so why are the government and security services seemingly in denial about the threat?
Have you been to Salisbury? Have you visited the cathedral, whose 123-metre spire the two men identified as Russian military intelligence assassins claimed was the reason for their visit on two consecutive days in March this year?
Have you walked the streets where Ruslan Boshirov and Alexander Petrov carried a bottle of military-grade nerve agent in search of their victim, Sergei Skripal?
It’s not Stonehenge that will surprise you, it’s the tanks, the camouflage nets, the live ammo rounds