As we endured the latest round of this miserably one-sided fight, my mind turned to the two men sitting to the left of their respective leaders.
It’s a decent bet (the double pays 22/1 with Paddy Power) that George Osborne and Tom Watson will be the next leaders of their parties, and will one day be squaring off against each other on these Wednesday lunchtimes, which would at least be more unpredictable.
Tom was doing his usual thing today, or at least his usual thing since he became Jeremy Corbyn’s deputy: utterly silent, smiling inscrutably, a look of faint amusement and utter detachment on his face.
The only times his lips tightened were when a backbench MP used Corbyn’s gaffe-a-thon with Andrew Marr on Sunday to allow the Prime Minister one of several free and gleeful hits on Trident, secondary picketing, and the Falklands, the latter a comradely gift from the DUP’s Nigel Dodds.
Obviously it wouldn’t do for Tom to smile when David Cameron is shoeing the poor, defenceless old man sitting next to him, but you wonder if these are also the moments when he realises Corbyn cannot go on much longer like this, and ponders being up at the despatch box himself very soon.