Strange message about ‘vaccine allocation’ on NHS Covid booking site?

[22pink]

Does anyone know what this means please, in relation to the ‘allocation’ of the vaccine? Thank you.

“According to your vaccination records, you have been allocated a coronavirus (COVID-19) vaccine not currently available through this service.”

You can't book a vaccination appointment in this way. Most likely your GP surgery will contact you about it.

Or you've been allocated a specific vaccine which isn't being administered via appointments booked via the NHS site.

Ok, thank you, so I am definitely eligible for one?

You can only book the mRNA vaccines via the central booking system. Did you have to have AZ last time?

The first two were Pfizer but I can’t remember what my booster was. I can check though.

That's weird then.

Yeah, I can’t find any reference to what it means online!