Deputy Prime Minister Nick Clegg has announced that all four-to-seven-year-olds will be given free school meals.
From next September families will save around £400 pounds per child after a project pioneered in London.
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The 24-year-old was unarmed and the incident is not being treated as terror-related.
Some platforms have been taken out of service with disruption expected to continue until the end of the day.
The Met Office has extended its weather warnings for snow and ice to cover vast swathes of the country, including London and the South East.