There are two things I learned in maths at school: the square of the hypotenuse is equal to the sum of the square on the other two sides, and how to write my name in numerals on a calculator. You may think that's not much to show for 11 years of effort in trying to put numbers into a brain that only ate words. But knowing how triangles work is a damned useful thing when looking at the world and working out where it's gone wrong. And the more I see of her, the more it looks like Rachel Reeves'