By Matt Chorley, Mailonline Political Editor PUBLISHED: 11:20 EST, 18 June 2013 | UPDATED: 02:31 EST, 19 June 2013 The leader of one of Labour’s biggest union backers sparked fury last night after likening Kate Middleton to ‘young women having babies to get state handouts’. Unison boss Dave Prentis took aim at the heavily pregnant Duchess of Cambridge in a speech attacking government cuts to welfare. Labour leader Ed Miliband was urged to distance himself from the ‘outrageous’ attack just weeks before she is due to give birth. Outrageous: Dave Prentis, general secretary of the Unison union, likened the Duchess of Cambridge to a benefit scrounger
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Unison leader Dave Prentis took aim at the Duchess of Cambridge during a speech attacking welfare cuts
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The union has given £4million to Labour since Ed Miliband became leader
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Tory MP demands Mr Miliband distance himself from 'spiteful' slur
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Union boss also criticised cost of Lady Thatcher's funeral
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And branded UKIP's Nigel Farage a 'conman extraordinaire'
Mr @placeholder's jibe was dropped from an official transcript of his speech posted on the union's website.