How should I expect to dress for classes and other academic meetings?

Though you should expect to behave more formally in classes in Oxford than at home (no eating, drinking, or gum chewing for example) you’ll find that dress is fairly casual, and anything clean and tidy will be fine.  You should not, though, wear a hat or cap inside as this might be read as rude.  You’ll get more hints on how to avoid things which might appear too informal or rude in Briton once you arrive:  but as you pack your clothes, put in one smart and more formal outfit for more formal occasions but casual item are fine for the most part.