@Kezo Have you tried the NHS online portal (or App) to book it?, I booked both of us for Flu and Covid no problem. https://www.nhs.uk/nhs-services/covid-19-services/covid-19-vaccination-services/book-covid-19-vaccination/?wt.mc_id=eva2_002_AW24_emails
Even though its nhs “UK”, it only applies to England and doesn’t apply to Wales etc 😂