The NHS sent me an email almost immediately after I logged my positive LFT to let me know they would contact me in 24 hours to start the process of getting treatment (in my case, antivirals). In the end, it took a lot longer than that, and a lot of chasing around, but we go there in the end (I actually got my replacement home PCR test kit before I got the prescription!).... but.... the NHS seems to have all my medical details in one place, and everyone along each step of the journey had access to them. Perhaps I was lucky, but my covid symptoms were relatively mild: I didn't feel dreadful and they worse day was day 2-3 after the initial symptoms and then it was very slowly improving every day. My MS symptoms seemed relatively unaffected. I hope you're as lucky and you get the support that you need!

ugh. typos!