Labour claimed cuts to child benefit that came into effect at midnight, combined with a three-year benefits and tax credits squeeze, was a "huge assault" on millions of working families.
Research compiled by the Commons library for the shadow equalities minister Yvette Cooper shows 4.6 million women who receive child tax credit directly will be hit by a cap on welfare increases, according to the Guardian.
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Theresa May has launched her bid to become the next leader of the Conservative Party.
The government is set to announce that David Cameron's successor will make the decision on whether to expand Heathrow or Gatwick.
Michael Gove is to stand for the Conservative Party leadership, saying he does not believe Boris Johnson can "provide the leadership".