I believe all the integrated schools have a similar policy. It’s quite understandable really. A number of the students have come straight out of six form and may have never worked for a professional company and my not have a proper understanding of why image is so important or why "individual" dress sense is unacceptable. Those who know better deserve to be told!
microfilter
I also get the impression you hold a grudge against OAT. Maybe you have a good reason, if so I think you should be up front about your reasons for badmouthing them. You come across as bitter rather than someone offering an honest insight into the company.