Sorry, first world problem I know. I told DD that I used to do my tie at school so that the top button could be left undone but it didn't look too obvious so wouldn't get told off, and that I'd show her how to do it so she can do the same since she doesn't do her button up but constantly gets into trouble. It's not a chavvy fat knot, it looks quite smart but I can't remember how to tie it or what it's called. Bit of a long shot but any ideas? It's quite a large knot but has a smart appearance.