The government has announced a change to the vaccination programme to aid the booster rollout.
People will no longer be required to wait for 15 minutes after receiving their jabs to speed up vaccination efforts.
Boris Johnson has set a new target to offer boosters to all adults who want one by the end of the month to curb the spread of the Omicron variant.
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The Department of Health and Social Care issued a statement to confirm the wait time has been axed, which is estimated to increase NHS capacity to administer jabs by 23%.
It said: "The Chief Medical Officers (CMOs) of the UK and lead Deputy Chief Medical Officers (DCMOs) for vaccines have considered whether, in the light of the very considerable need to speed up vaccination and boosting in response to Omicron variant, the 15-minute wait for some mRNA Covid-19 vaccines should be suspended.
"Their view, having considered the views of the Covid-19 Vaccine Benefit-Risk Expert Working Group (EWG), NHS planners and others is that with the low rates of anaphylaxis, in the context of the considerable need for people to be boosted or vaccinated, the 15-minute wait after a vaccination with mRNA vaccine will cause more harm than it can avert because it will significantly reduce the number of people who can be vaccinated over a short period of time.
"The 15-minute wait should therefore be suspended for first, second and homologous or heterologous boost vaccinations with mRNA vaccine given the current situation, with this operationalised in line with the needs in each of the four nations."
The wait time was introduced after two NHS staff suffered allergic reactions on the first day of the vaccine rollout last year.
Those who have a history of allergies, particularly to other vaccines, or have had an immediate reaction after a previous doses, may still be advised to stay for the 15 minutes
Each of the UK nations will determine how they will use the advice.
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