Here are just some of the speeches they've tried to hide:
Cameron pledges there will be no major changes to the structure of the NHS (November 2009)
Cameron tells an audience at Google that the search engine is giving people power (May 2006)
"What Google has achieved is truly amazing…. You’ve begun the process of democratising the world’s information. Democratising is the right word to use because by making more information available to more people, you’re giving them more power"
George Osborne commits to increasing state spending (October 2007)
"I have committed us to two per cent a year spending rises for the next three years. This will mean real increases for our public services."
Cameron pledges to let the public kick out MPs halfway through a parliament (February 2010)
Buzzfeed reports "The government is belatedly introducing a watered-down version of this law. But now you’ll struggle to find his original speech"
David Cameron’s sets out his Big Society vision (November 2009)
George Osborne praising the internet’s ability to make politics more accountable (March 2007)
"We need to harness the internet to help us become more accountable, more transparent and more accessible - and so bridge the growing gap between government and governed"
They've also deleted the records of David Cameron’s April 2006 trip to the Arctic to raise awareness of climate change
List thanks to Buzzfeed