A small number of people who have received an autumn flu jab have mistakenly been given a standard egg culture influenza vaccine (QIVe), NHS England said.
And for the first time, those eligible for a flu vaccine will be able to book an appointment online under a new pilot with more than 200 sites across the country.
Britain has been warned of the impending threat of a twindemic - the phrased coined for Covid striking at the same time as flu. MailOnline has set out all you need to know about the upcoming flu season.