Margaret Hodge, who chairs the Public Accounts Committee says far from convinced that the £400 million spent so far on the Work Programme will turn out to be good value for money.
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The Met Office has weather warnings in place for snow and ice until 10am in the north and west.
The plan, which would effectively strip banks of the benefit of recent corporation tax cuts, forms part of the party's election manifesto.
Pop star went into the icy waters of Chicago's Lake Michigan at a fundraiser for the Special Olympics and later said "her weave froze".