And – in what is admittedly something of a first for Labour’s leader – there is also some basic political calculation underpinning his EU manoeuvring. Team Corbyn recognise their only hope of reversing their electoral fortunes rests on some form of explosive decompression of the Conservative party. And this, they have judged, is best brought about by a “No” vote. The Government would be plunged into turmoil. David Cameron would probably have to resign. George Osborne would probably have to resign too. The entire Tory modernisation project would be derailed – or so the theory goes.