Two party leaders.
Two manifesto launches.
Two questions asking about financial details.
Two leaders turning to their Shadow Chancellor.
One Shadow Chancellor answers the question straight away.
One Shadow Chancellor, er…, despite having advanced warning is still flipping through the paperwork in front of him when the party leader turns to him and can’t answer the question.
Can you guess which was Vince Cable and which was George Osborne?
Here’s a clue: