Britain is paying professional aid staff up to £1,000 a day to work in developing countries as part of a spending "frenzy" to meet a government target, a new report suggestst. Spending on consultants has doubled in the past four years to £1.4bn with the bill for outside help now eating up more than 10 per cent of the aid budget. The figures prompted anger among MPs, who described the practice as a "grotesque waste".