Liam Byrne is expected to propose Labour focus on the costs of "delivery problems", such as the cost of implementing universal credit, before they tackle benefits:
Labour will bring Social Security spending under control by tackling the long-term drivers of spending.
The first thing we are going to have to do is put out the fires currently spreading through Iain Duncan Smith's Department for Work and Pensions.
We need to tackle these delivery problems head-on before they eat up even more public money.
Because three years into this Government, their promised welfare revolution has collapsed because of a failure in basic delivery.