Ive been invited to have an informal look around a department/research labs etc next week prior to the actual interview which takes place a few weeks later (for a post doc position). Any suggestions as to what would be appropriate to wear (btw Im female). Since the email states "informal" would a smart pants and jumper be ok? I have a lot of travelling to do to get there (flight and train) so I want to be comfortable and carry as little as possible with me. Has anyone else had one of these informal visits before?