Should you ever find yourself in conversation with a British person and they’re saying things which seem polite on the surface, with perhaps a little undercurrent of scorn, you might want to have this infographic ready to consult.
It claims to be a translation of British for people in the European Union, but these themes are universal. Have a look, it’s not bad.
Note: I’m not entirely sure where this originally comes from or who made it. The earliest sighting was on a blog by Oxfam.