There is little to say. Cameron had the opportunity at PMQs to create a huge divide between Brown and Darling on how they are going approach the budget. He failed.
He had an open goal, that he missed because he didn't even kick the ball.
To cap his failure off, Cameron got his facts wrong:
Cameron also messed up his final question. He meant to asks about GDP per head going down since 2005, but he asked about the fall since Labour came to power, and Brown was able to say – correctly – that it has risen since then.
A very tired looking Brown will be very relieved after this non-event.