The PM, on his way to Iceland, had to stop by the Commons first for his weekly round of questioning from hostile opposition MPs and pliant Tories.

Or, as the Commons calls it, Prime Minister’s Questions.

Though, to be fair, Jeremy Corbyn has rather re-jigged the event in recent weeks to look more like David Cameron’s 'call-in half-hour'.

But there were no questions from members of the public this time. Or so, initially at least, it seemed.

Instead, Mr Corbyn said he was asking questions that he himself wrote but "on behalf of the people of this country".

No matter, it was all the same question.

'Would people lose out through tax credit cuts next year?'

Mr Cameron refused to say.

He hit back at Mr Corbyn, and the Lords who defeated the government on Monday, dubbing them a “new alliance between the unelected and the unelectable".

Just to keep Mr Cameron on his toes, however, the Labour leader's last question was from “Karen”.

And, you guessed it, it was the same as the previous five.

Still Mr Cameron gave nothing away.

Perhaps the PM's mind was on Iceland.

Opponents are cock-a-hoop at the vision of the PM travelling to a country that is outside the EU to make the case for staying in the EU.

To them it's a confusing image, like the lesson children are taught to remember the difference between Iceland and Greenland (one is icy and one is green - and, no, it's not the way round you think).

Or maybe it was the icy demeanour of some of the Tory backbenchers, preparing for life after Cameron.

Elsewhere, SNP leader at Westminster Angus Roberston again pressed the Prime Minister to publish a report into the suicides of those whose benefits have been stopped.

And Tim Farron had his first question at PMQs since he became Liberal Democrat leader.

His party don’t get weekly questions any more – that slot was taken by the SNP when they became the third party at Westminster.