Rowena Cockayne from North London stands to lose around £100 a week when her benefits are capped in July.
The mother of two said she will not be able to pay her rent and will end up being evicted, "I don't know where I will be sent, even further away from my support network."
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Workers are also taking out payday loans and pawning their belongings just to get by, according to a survey by Unison.