It's more about assigning blame to whoever was in charge, not to what they actually did, right?

"This election will be far from ordinary. It is not only a referendum on Brown, who became party leader and prime minister in 2007, after waiting ten years for the more charismatic Tony Blair to resign; it is also a referendum on Labour's 13 years in power and, on an even more basic level, on the economic principles that have guided the party's rule. It is in such moments that, as Karl Marx once mused, "all that is solid melts into air." Britain has had a few such upheavals before. The 2010 election will likely be one, and its consequences for foreign and domestic policy will be profound."

Foreign Affairs: Labour Pains. Why the British General Election Is a Referendum on Its Past, May 4, 2010

Guardian: Gordon Brown calls for those opposed to Tories to unite behind Labour, May 4, 2010

DerStandard: Kommentar: Nochmal scheitern, 4. Mai 2010