Exclusive: Chancellor said to not have opposed jab regime but warned of spending cuts or tax rises to pay for it

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Rishi Sunak has issued a stark warning to Department of Health officials over the multibillion-pound cost of regular booster rollouts, the Guardian has learned.

Sources said the chancellor raised the point in several Covid meetings that a mooted three-month booster regime – more frequent than originally anticipated – could begin to impact on future spending.