Shadow work and pensions secretary Rachel Reeves said it was "completely unfair" that many disabled people were hit by the "bedroom tax" and charged for the space used to store essential medical equipment.
"Britain can't afford another year of David Cameron and Nick Clegg's tax on bedrooms," Ms Reeves said.
"If they won't listen to the country and scrap their hated bedroom tax, then a Labour government will," she added.
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The 110-year-old organisation is trying to negotiate a potentially mammoth compensation plan for abuse victims to allow it to survive.
The bank says parts of its business are not performing well enough.
The showers will be heavy in places with hail and thunder, and some snow is also likely on hills in the north.