No. Those rights were given to pre-1997 licences and they are valid to 70, then with 3-yearly medicals.Does that include licences that already have a C1 on it “grandad rights” ?? As our MH is a C1 which my partner drives on his licence with no trouble ?
The OP said he doesn’t have a C1. If he acquires one now it’s 5-yearly medicals (actually from 45 not 50 as I said), then every year from 65.
I would guess that much will therefore depend on his age. If young and in good health fine. If say 60, many would have to think hard about the prospect of annual medicals from 65.