Absolutely this.
My DD has done full time WFH since Covid. She works for the civil service. She was previously PT due to her narcolepsy as they didn't allow FT WFH - she did three days a week with one day a month in the office catching up with her team etc. Since going FT she's come off all income related benefits (she still gets PIP).
The office she works in has been closed. Her office is now over an hour away. They have to book a desk in advance and there's no catching up with her team anymore.
Yet she's been told that in the next couple of months she's no longer going to be allowed to ft WFH. Her flexible working request was turned down as they "not doing any ft wfh" despite the fact her boss, and their boss, were supportive of it.
If she can't find another FT WFH position she's going to end up back PT and needing help from income based benefits.
She is exactly the kind of person that the government should be encouraging the CS, and other employers, to have in FT WFH roles. In her role, which absolutely can be done WFH, the CS should be leading the way with WFH opportunities for people like her. But no.