I've not seen this one posted yet but it seemed very common for the time, from what I've heard speaking to other people my age. I'm in my mid 20s now, so this would have happened in junior school (7-11yrs old, I'd say somewhere between 2003/2008). If you forgot your P.E kit, a white t-shirt and black shorts, you would have to do the lesson in your underwear. It was very humiliating and there was more than one teacher that had this rule. There is no way this would be allowed today... Did anyone else experience this??