The Deputy Prime Minister Nick Clegg has given his response to David Cameron's speech on the welfare system.
Speaking during a visit to Sheffield's Children's Hospital, Mr Clegg said: "David Cameron was speaking as a leader of the Conservative Party about his own personal ideas about the kind of things he would like to see happen after 2015.
"He is entirely free to do so, as is any leader of any political party."
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The pair, believed to be the boy's mother and stepfather, were held after the five-year-old's lifeless body was discovered in a lagoon.