Medical history/diagnoses

[JetTail]

I'm just wondering whether anyone is under different hospital trusts for different conditions?
My local hospital trust covers 3 London Hospitals and sharing within that trust is readily available between the hospitals (blood results/attendances at A&E/admissions).
However, I am also under a different hospital trust for exploration/monitoring of one diagnosis.
Obviously the GP can see all letters, but they are not necessarily proactive about joining the dots.
My concern is that on my list of diagnoses at the local hospital trust, one diagnosis is not recorded (as it was diagnosed following an admission to the other trust as the ambulance brought me there as nearest hospital was on divert) and they are indeed not aware of it even being investigated.
I wonder how things operate on that basis if anyone else is in a similar situation? I'm thinking along the lines of the importance of all diagnoses being available at A&E should I ever be unconscious on arrival?

Thank you.

We’ve had difficulty in London with this and epilepsy. Being admitted on blue lights to resus multiple times fitting becomes ‘mum witnessed a suspected seizure’ at another hospital. No record of admission, and worse no belief of my word. I feel like it’s gaslighting sometimes.

I've had similar happen but didn't want to give too many details. Not with a condition for which warning bracelets are offered for though. I've crashlined (I think that's the term) a couple of times since January and still they do not know of every occasion!