Yes, the figures that the Government itself puts out have been in the media for years, but they're on the unreliable side (triple accounting and that sort of thing). Also you'd have to take into account how much of the increase was due to the increased cost of having private companies carry out public works - in other words how much of the public spending increase is being converted into private profits through PFI deals.
Just thought that since you made a claim you might be able to back it up with some suitable figures.