I wore a mankini with it hanging out the side :)
Smart but casual
Something neat and comfortable. You could be there for a few hours. I wore black jeans and a plain navy jumper.
You should wear something smart.
Smart casual wear..
Smart - trousers/skirt and smart top.
Smart Casual clothing
Normal business attire
I was shock that people turned up for interview wearing anything, even leggings! Those are the people they attract. Just don't bother to dress up as you won't fit in with those lot!