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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Patrick O'Leary, 46, mugged the 70-year-old charity collector outside her home, also stealing her handbag and cash.
The Duke and Duchess of Cambridge will send their two-year-old daughter to Willcocks Nursery School, near their home at Kensington Palace.
The Queen approved the nomination to succeed the Rt Rev Richard Chartres in the Church's third most senior position.