Prince Charles arrives for memorial for Sir David Frost at Westminster Abbey, names from 50 years of TV there http://t.co/9eir1doVuI
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David Cameron has pledged to reduce the annual benefits cap to £23,000 "within the first few days" of a Conservative election win.
Ed Miliband is to outline Labour's "10-year plan" for the NHS after warning it faces "its most perilous moment in a generation".
Argentina's president has announced plans to disband the country's intelligence services following the death of a state prosecutor.