Treasury sources concede ‘less room’ for manoeuvre as global bond sell-off also hikes government’s borrowing costsInternational bodies warn of rising debt and borrowing risksBurnham stands by claim UK is ‘in hock’ to bond marketsOil prices lurched upwards again on Thursday, creating a growing headache for UK policymakers ahead of John Healey’s budget next month.While Healey has been keen to present an upbeat picture of the UK’s economic prospects, Treasury sources concede the sharp jump in oil a