Back in the 1991, I was part of the staff on a school trip to the Isle of Wight for a week. Whilst crossing the Solent, I spent the time idling, and I folded the £10 notes in my wallet into triangles. On the island I broke into these notes. One week later , back in Harlow, several hundred miles from the I-O-W, I got, in change from a purchase with a £20 note, a tenner with all the tell tale signs of being folded into a triangle. Here we are in 2013 and I've never seen another one.