Last Friday was hat day, which meant that everyone was wearing a hat of varying suitability. I took the easy option and wore my standard hat which you have already seen. A variety of beanies were visible, an umbrella hat, a bathing skull cap, a couple of tiaras, a multi-coloured felt top hat which caused a statistician to exclaim 'Venn diagram!' but best of all, a horned Viking helmet. Otherwise normal business analysts and programmers have this sort of stuff just lurking in their wardrobes? Scary!