Mr Cameron became the youngest leader of a major political party since William Pitt the Younger when he took up the Conservative party's reins in December 2005.
Since becoming leader the Conservatives have enjoyed an upturn in opinion poll fortunes as the government lost ground over the Iraq war and home secretary John Reid's admission that his department was "not fit for purpose".
But Labour party chair Hazel Blears says that when you take away the "image and PR branding", Mr Cameron's Tories "do not have the answers to provide security in a changing world".
Ms Blears says that the Tory party leader's policies have simply "put a gloss" on those that preceded them, putting the economy, the NHS, public services and hardworking families at risk.
Among the policies in the Labour chair's firing line are tax breaks for married couples, hugging hoodies and "unworkable" green taxes.
"The record of David Cameron's leadership is clear. Whether on policy or on reform of his party, he has failed to change the Tories in the way he has promised, and remains, in his own words, 'Conservative to the core'," Ms Blears added.
At the Conservative party spring forum last month, Mr Cameron insisted that his party was "changing".
"People said we'd never get more women candidates without compulsion; but you selected them. Over a third of our candidates are women - up from just nine per cent in parliament today," he said.
"And if last year was all about change, then this year is more about grit. The gritty determination to say where we stand on the big issues; to stick to our guns; to take tough decisions - and when the right thing to say is unpopular, to say it anyway - because it's right."
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