Hi.
I just graduated from the PG Dip at KCL and I did a psych degree before that. I had no healthcare experience beforehand, so I just drew upon university experiences and prior education to complete the APEL.
Do you have any care experience? I would think that might be a good place to start, for instance to answer your first problem you could discuss manual handling a frail or bariatric patient as this might not be as straightforward as you might think. It sounds simple, but they don't need over-complicated answers and I got in by discussing the skills I learned at uni, as you use problem solving processes with teamwork, communication etc.
Also for your second point: I just discussed essays for mine, you'll be doing a lot of critical thinking in your King's work so any experience you have is handy.
Just my two cents, but I got in with just a uni degree and, imo a weak APEL form. This was after the maths/literacy tests and group discussion - I think they'd made their decision by then, I wouldn't worry about APEL too much.