Going to book my booster online (age 30+ with second dose 4 months ago), when entering my NHS number it just redirects me to book my 1st and 2nd dose, doesn't seem to understand I'm wanting the booster. Both 1st and 2nd doses are showing in the NHS app so don't know why it wants me to book them again. Do we have to wait for the website/booking engine to update for the booster jab?