A single mum who relies on Universal Credit to top up her income as a part-time dinner lady is challenging what she says is the government's "irrational" welfare scheme.
Danielle Johnson, 25, from West Yorkshire, said: "I have never been this financially unstable before."
Together with three other single mums, she is claiming in the High Court that the new payment system disproportionately affects single parents - most of them women.
UC is a means-tested benefit.
It rolls six separate benefits into one payment and has proved…