Roger Mills wrote:

Extending that analogy to your bed, my starting point would be to remove
the springs with the bed fully up against the wall. However, you probably
can't get at the springs in that position - in which case you need to fold
it down by the least amount that *does* provide access, and prop it in
that position so that it doesn't collapse without its springs.

That makes good sense. Thanks. I must have done this (albeit tensioning
rather than the opposite) when I first put the bed together, but annoyingly
I have no memory of it at all.