Jeremy Corbyn is still a lightweight, which makes Theresa May’s inability to defeat him all the more distressing for her own side. Corbyn bounced about from question to question, naturally elated by the Government’s climb-down on the Universal Credit phone charge.

He sought to rile the Prime Minister by asking her whether falling wages are “a sign of a strong economy”. This should be favourable ground for the Conservatives, given Corbyn’s inveterate refusal to understand the economic facts of life.

May did make some attempt to teach him some home truths: “Government has no money of its own. It collects money in taxes from businesses and people.”

But the time is ripe for a much more general assault on Corbyn and John McDonnell’s prescriptions. One trusts the Prime Minister’s staff are at work on an Elementary Economics Course for Lefties, in which the damage their wishful thinking would do is brought home.

The House was exceptionally noisy, for both sides detected chances to damage the other. But when the sound and fury had died down, it was found to have signified almost nothing.

Neither side had struck anything like a knock-down blow. But Corbyn is now so confident that a touch of hubris has entered his demeanour. He feels so vindicated that he has become vulnerable. The Corbyn bubble has swollen to such a size that puncturing it should not be beyond the wit of May.