UC result, Put in LCWRA group after call - what do I do next?

Apologies if this is a repeat question but, i'm struggling to find an answer.

Background:
I currently get PIP at the enhanced rate for both.
I have both physical and mental health comorbidities
My partner gets Carers Allowence for me.
Previously we got Child Tax Credit and Income Support as a couple.
I've never claimed ESA (nor am I eligible for new style ESA)
We started managed migration to UC at the end of September 24.
I returned my completed UC50 form around Xmas 24.

Last Tuesday, an Assessor from Independent Assessment Services (0800 260 0700) randomly called out of the blue.
I was asleep and my partner panicked and just handed me the phone.
My anxiety kicked in (it also have concentration issues due to meds ect). I was very groggy & don'think I made much sense, going off on tangents .

I didn't have the time to record the call; which lasted 7 mins and 3 seconds
She seemed nice, but I did not hold out much hope.

On Friday evening there was a message / letter - I have been placed in the LCWRA group.

Now with PIP I've always requested the assessors report (as advised by these forums - thank you again).

So my questions are:

1. Was that a "Paper" assessment?
2. Which form do i request - UC85 Or UC85a?
3. Do i need to request anything else?
4. I'm planning on requesting this via the phoneline (is this the best way)

Many thanks