Miliband will not mimic Cameron's approach to Ukip and change policy direction.
As the party has shed votes to the SNP and the Greens, the Tories have emerged in front merely by standing still.
Defeated parties do not regain power by fighting old battles but by convincing voters that they have changed.
The PM's sheer chutzpah allowed him to command the session.
The Labour leader has responded rather late, and very carefully, to the Greek anti-austerity party's election win.
The ideological differences between the parties are greater than for decades. But their shared culture means few have noticed.
Aided by a run of good news, the PM turned every question to his advantage.
Ed Miliband has hinted at a big announcement on higher education, an area where the party seems confused at best.
Labour leader says new individual registration system is "David Cameron and Nick Clegg’s final insult to young people".
Both men are more the servants than the masters of their parties and face being overwhelmed by factionalism.