Extracts of the letter sent by Quentin Davies to David Cameron today. This will hurt, for the simple reason that it is demonstrably true.
"Under your leadership the Conservative Party appears to me to have ceased collectively to believe in anything, or to stand for anything. It has no bedrock. It exists on shifting sands. A sense of mission has been replaced by a PR agenda."
"The last year has been a series of shocks and disappointments. You have displayed to the full both the vacuity and the cynicism of your favourite slogan 'change to win.'"
"It is fair to say that you have so far made a shambles of your foreign policy, and that would be a great handicap to you - and, more seriously, to the country - if you ever came to power."
"PR pressures had overridden any considerations of economic rationality or national interest, or even what would have been to others normal businesslike prudence...You thus sometimes treat important subjects with the utmost frivolity."
"Although you have many positive qualities you have three, superficiality, unreliability and an apparent lack of any clear convictions, which in my view ought to exclude you from the position of national leadership to which you aspire."
"I am looking forward to joining another party...which has just acquired a leader I have always greatly admired, who I believe is entirely straightforward, and who has a towering record, and a clear vision for the future of our country."