To think this isn't a reasonable suggestion from DWP

[Jenneypops]

Claiming universal credit as husbands hybrid role went fully office so he's looking for a new role and we qualify for support as low incomes.

We are in Staffordshire his office was in London. The staff member asked why he's given up his job instead of moving to London.

That is not a reasonable suggestion in my opinion, and it was delivered with a very snotty attitude. Why are some people on jobs to help people they clearly don't want to be or are useless at? No consideration for the fact we could never afford the rent there etc.

Can’t speak for the OP, but in my case:
Applied because I didn’t know how long it would take me to find a job and I was worried about money. I do not have savings to fall back on, I’ve been in education.
Took a month for my claim to be processed and to get an initial interview.
Got a job offer three days before the interview. Still need the money because the job doesn’t start for another month (not my decision).

Whatever employment law might say there are plenty of employers resiling from WFH arrangements that seemed pretty sound during and in the aftermath of the pandemic.

Whether an employee on 100% WFH would win at a Tribunal when Employer decides there's a 'business need' for them to be in the office even 50% of the time isn't a slam dunk for the employee.