Doodle
Calendargirl I followed the link in the OPs post. It just asks you to put in your NHS number and dob. Nothing about receiving a letter or text.
I put DH’s details in, (he is only 69), really to test if younger people could book in, as someone on GN said they could. (No intention of booking an appointment, we are happy to wait for our ‘turn’.)
It stated that he was not eligible yet, which of course I knew, and that you should only book after receiving your letter.
I do not disbelieve what you are saying, it seems to me different messages come up for different age groups.
I was using the OP’s link.
No doubt when DH and I are eligible, it won’t say that.