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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It ends a political standoff that briefly saw Yahya Jammeh and Adama Barrow claiming leadership of this tiny West African nation.
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The historic moment was watched by 500 people in the Church in Wales who cheered after the ceremony.