One of the great mysteries of modern politics is how the leader of the Labour Party manages to smuggle a sharp pointy stick past Commons security every week to poke the Prime Minister. Ed produced it with his usual flourish just after noon today and proceeded to chase Dave around the dispatch box for the 30 minutes of the fun known to regulars as Prime Minister's Questions.
We all know the PM has been in the doldrums since the Chancellor produced THAT budget six months ago, but each week he hopes to recover. In fact, so good, relatively speaking, were last week's economic indicators that he had high hopes this would be his week. But such is the disarray within Tory ranks the every time he thinks he's about to climb out of the smelly stuff one of his own pulls him back in again.
You could tell treachery was afoot by the volume of support he got from his own side during today's spat with Ed Miliband over that most unifying of party policies - Europe. The latest row is over a planned increase in the EU budget, which has Tory sceptics snarling and ready to force a vote this evening demanding it be cut instead. Spotting this passing bandwagon, Labour climbed on board leaving Dave, as Ed was happy to point out, with only his embarrassment to keep him warm.
With Ed and his cohorts ready to join Tory rebels in the lobby this evening, the sound of support for the PM from those who intend to vote against him doubled in decibels, leading Speaker Bercow to call for calm. But there was even more pleasure on the opposition benches as the Speaker took his own opportunity to remind Dave that PMQs were not questions from the PM but for him."I've told him ten times," he said as Dave slumped in his seat.
Normally, Ed takes his full six questions to turn the screw as tightly as possible on the PM, who seems to have abandoned any attempt to hang on to his temper. But he decided to split the torture in two today, leaving Dave sweating over the second bout as he paid lip service to MPs whose questions filled the gap. To Labour's great pleasure, the day had begun with another clash between the coalition partners over energy policy. Just last week, the Lib Dem Energy Secretary, Ed Davey, had gone into a major sulk when Dave announced plans for energy companies to give everyone the lowest tariffs - although he didn't really mean it.
Well, Davey had his bottom lip way out again today when one of his Tory juniors appeared to announce the end of the Lib Dem plan for renewable supplies by sticking a wind farm on every street corner. What was the policy, demanded Miliband, and none of your business was the reply. But even Dave knew this was merely another pre-lunch taster on the way to the main course.
Six months ago, when Chancellor George was still in the game, he commissioned Michael Heseltine to take a look at the economy in a move intended to demonstrate his confidence in criticism. And so it was with some pleasure that Miliband read out this paragraph from Lord Hezza's conclusions: "The message I keep hearing is that the the UK does not have a strategy for growth and wealth creation."
George stared off into the space reserved for those who have uttered the immortal phrase, "beam me up Scotty", only to find out it does not work. By now, the volume button had been turned up so high that the Speaker uttered the dire warning that if it continued they would be kept back after class. The thought of being late for lunch clearly worked, and MPs headed off to work out how to vote on Europe later. Dave looked like someone planning a sandwich at his desk.