The Cabinet Office told me this morning that the £800m IT and outsourcing government savings being reported is not accurate.
The figure is referring to the initial saving the government has been able to gain from existing supplies contracts.
In July Francis Maude met the CEO's of the government's top IT suppliers to find ways of cutting costs.
But a Cabinet Office spokeswoman told me the process is not complete and they do not even know the figure. She said: "The savings will run into the hundreds of millions but it is too early to say."
I am sure the £800m figure has come from a good source so I look forward to seeing how close to this it is.