Ask an Property Solicitor. Get an Answer ASAP.
That is unlikely to be sufficient as we are all now entitled to a flow test so the court would expect you to go to your local chemist and carry out a test.
If it is positive then of course it will then be sufficient but it is negative then you will not be granted an adjournment.
I presume the hearing is in person rather than remote.
The court will not want to adjourn a 2 day Final Hearing so as I say anything less than a GP letter stating that you cannot attend is unlikely to be sufficient.
I am not sure what you mean....
I can only reiterate - you need a single letter from your GP setting out your health issues and that you cannot attend rather than it be preferable to not attending.
The court will only adjourn if they have no option.
You will need to ask that in a new thread.
Sadly I personally do not deal with such matters.