When creating, or even looking at, a banknote design, one of the first things you realise is their inherent and very deliberate imperfections. There’ll be an apparent mis-registration of colour, a strangely ragged line, a discontinuity in a pattern or an odd serif or ligature on a piece of lettering, but it’s exactly how it was designed. Without it, it wouldn’t be right. The design of banknotes represent something I find gloriously poetic — imperfect perfection — if it was perfect by our usual standards, it would be imperfect. Wonderful.