Sharon Hodgson, Labour's shadow children's minister, said David Cameron had created a "childcare crisis".
She said: "On his watch, we've seen costs spiral, support for families cut back and over 400 children's centres close."
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A woman and man have been charged with murder after a baby was found unresponsive on a bus.
Rebecca Casserly was on her way to buy a coffee in north London when her phone was suddenly snatch from her hand by a man riding a bike.
Lee Curley took more than 120 pictures and videos of his attacks on the girl, said to be under the age of 13.