Thinking of what Ally goes through, I think if I were sitting with a GP who knew me and I was totally reliant on lipreading, I'd be in tears. Here's where I'd meet OtE half way on something (but I don't think he'd meet me halfway) which is that while I don't think people should be obliged to use official sign interpreters as he's said here, I do think we need far wider availability of sign interpreters, even if in some places, for want of better, it's a pool of local volunteers for urgent appointments.
I say that as someone who's acted as an impromptu oral interpreter between a neighbour and a doctor. My knowledge of some languages is basic, so we had to make do with me translating the doctor's English questions into Urdu and translating my neighbour's Punjabi responses into English. (Sort of like Italian + Spanish or like Dutch + German.) But it was enough for what was needed to get an urgent visit followed by more professional translation help.
There also needs to be more recognition by senior staff who set the rules as to people needing help rather than blanket 'go into your appointment alone' stuff.
I don't think in many places, and I mean even before the pandemic, there's enough recognition that people may need psychological support; or for others, to blend concepts, a 'dementia-speak interpreter' or a 'psychotic delusion interpreter'. In relation to the latter, in all seriousness, I believe that a lot of psychotic delusions actually make perfect sense if you see them as metaphors for what others perceive as reality. If you know someone, you can often 'translate' the delusional stuff into the reality it symbolises.
When I get like this, depressed & stressed => longwinded, I used to be labelled manic and given loads of meds to damp me down, so I got even more depressed, talked even more, and so the circle would continue. This isn't "I don't get manic", this is "Me rabbiting and going off on tangents is me feeling rough, being depressed and doing my best to cope. Thank you for helping me, folks, because I can mentally take you with me to my clinic appointment later this week.
And I'm sorry (slightly), Ally, but I'm going to picture you coming with me and if I have any communication problems, teaching me the signs for a range of expletives. But I know the sign for "It's not my fault for falling over, you barged into me, so stop giving me grief." I use the traditional two-finger one but I understand the modern one is the middle finger. Oh, that's not BSL? Oh well, people seem to understand it anyway.