The interview seems to consist of being asked when you can start! Just try and be clean and presentable
Anything as the interviews are not professional at all.
It doesn’t matter as long as you look good, or related to a certain family you will be fine.
Wear comfortable but smart clothes.
Smart but casual, think of what you would wear for the type of job your doing and go with something similar to what you would expect to wear but look neat and tidy
Smart casual eg- jeans and a poloshirt