UK doctors have said a government decision to delay giving a coronavirus vaccine booster shot to vulnerable patients who have already had a first dose will be distressing and disruptive.

The government said on Wednesday it wanted to give a first dose to as many people as possible before starting to administer boosters at 12 weeks, in an effort to provide more people with a degree of protection more quickly.

But Dr Richard Vautrey, chair of the British Medical Association (BMA) committee for local family doctors, said it was “grossly and patently unfair to tens of thousands of our most at-risk patients to now try to reschedule their appointments”.

For the newly approved vaccine developed by Oxford University and made by AstraZeneca being rolled out in Britain next week, the plan is consistent with a finding that waiting 12 weeks maximises protection against the virus.