A former Nato chief demands more cash while fixing Britain’s global role. Before billions are spent, ministers must define the purpose of its militaryGeorge Robertson’s claims about the prime minister’s “corrosive complacency” over Britain’s safety made headlines. But it is a howl of pain, not a sober security analysis. The former Nato secretary general and author of the government’s strategic defence review (SDR) wants Downing Street to back his view of Britain’s role in the world – as Robin to America’s Batman – with billions of pounds of cash. But his argument takes for granted what should be under scrutiny: Britain’s global military role itself.Donald Trump’s threats over Greenland, his disregard for international law and his U-turn over the Chagos deal expose the fragility of Britain’s defence assumptions. Before spending billions, those commitments must be re-examined. Lord Robertson’s claim of a £28bn black hole assumes that the current strategy is the correct one. But if t...