It was the battle of the stand-ins at Prime Minister's Questions this week.

David Cameron is in Japan for the G7.

There he's expected to have a nervous wait to see if any world leaders spontaneously back his bid for the UK to stay in the EU.

Just kidding.

But the Prime Minister's trip did lead to a game of musical chairs at Westminster.

And so at PMQs standing in for David Cameron we had George Osborne.

Standing in for the Labour leader Jeremy Corbyn was Angela Eagle.

And standing in for SNP Westminster leader Angus Robertson and Lib Dem leader Tim Farron were, er, Angus Robertson and Tim Farron.

At the start Mr Osborne appeared a little too excited to be in the hot seat.

He had to be reminded by the Speaker that he had to wait for an MP to ask a question before he could stand up to answer it.

Ms Eagle, known for her wit in the chamber, tried to skewer the Chancellor by telling him that he agreed with the union boss Len McCluskey, on the EU at least.

She faltered slightly, however, when she suggested that Brexiteers had been banned from Tory frontbench.

Conservative MPs jeered as arch-Outer Michael Gove signalled and waved at her.

Ms Eagle's plan clearly was to exploit Tory splits over Europe.

But, as ever in this referendum, the Conservatives did a much better job of that themselves.

As one Tory MP suggested that the EU would take over the UK in the event of an Remain vote, the Europe minister David Lidington took the folder he was holding and banged it off his forehead.

Standing at the side of the chamber, he was later seen miming hitting his head off a nearby wall.

For his part, Mr Osborne had some good lines.

Where was Jeremy Corbyn, the Chancellor mused as he discussed the upcoming Iraq inquiry verdict.

"(He's) at home wondering whether to impeach the former Labour leader for war crimes," he told MPs.

It was left to Mr Robertson to restore calm with a serious question - about the planned deportation of the Brain family from the Highlands.

And, despite a session that lasted 42 minutes, Mr Farron was not called to ask a question at all.