If you want a taste of what Cameron's speech on the public services was like earlier, do tune into his interview with Nick Robinson - video on the BBC website here. He's considerably more unabashed about talking cuts than he has been in the past, and stresses the "tough choices" that a Tory government would have to make.
It makes for a fascinating contrast with his press conference in January, when Cameron asserted that the NHS, schools, international development and defence would all see real terms spending increases under a Tory government. Pushed by Robinson today, he seems only to commit to increases for the NHS and international development and, even on those, seems quite evasive.