The coming Monday I have an interview and assessment day. They sent the e-mail out yesterday and they said that I should dress 'casual'. It's a professional firm and the day will involve making presentations and group activities. In my mind casual means jeans and a jumper, but then again I don't want to be too casual. I know the whole suited and booted look will also look out of place if everyone else is 'casual' so I want to be somewhere in the middle. What sort of look would you recommend?