Rollout of booster vaccinations began on 16 September, with hospital sites first to administer the top-up jabs and GP-led vaccination centres following close behind.
Almost 1.6 booster doses had been delivered in England by 5 October, according to NHS data - around 6% of the 27m target population included in cohorts 1-9 identified by the Joint Committee on Vaccination and Immunisation.
Vaccination teams have been told to prioritise vaccination of residents and staff at care homes for older people, with a view to completing booster doses in this group by 1 November.
NHS staff are also rolling out third doses of COVID-19 vaccine as part of the primary vaccination schedule for patients who were severely immunocompromised when they received earlier doses of vaccine. A number of these patients are currently included in the booster vaccination totals.
UK-wide, the vaccination campaign has delivered more than 49m first-dose COVID-19 jabs and more than 45m second doses. Rollout in London remains lower than in other NHS regions across England.
NHS England Medical Director Professor Steve Powis said earlier this week: 'Once again NHS staff have risen to the challenge of delivering the NHS booster campaign at outstanding speed with NHS staff administering vaccinations to those most at risk from COVID-19 just two days after government gave the green light.'