I applied online. The process took 2 days. I interviewed at Hays (Leeds, England) in Feb 2015
Interview
Quite informal, as they have already seen your CV and experience and as a supply teacher they don't need to give you work if you are not up to it. Mainly form filling and a few competency questions.
Interview questions [1]
Question 1
How do you modify your teaching style for different abilities?
No real interview process. It is an easy online portal to upload details. If you have worked internationally takes a little longer and you will need to have a character reference.
I applied online. The process took 1 day. I interviewed at Hays (Preston, North West England, England) in Feb 2014
Interview
Very basic, they are more interested in references and CV if you are experienced. Might be more rigorous if new to the profession. Asked a few basic questions about where I taught but they need to do background checks and let schools decide if you're any good once you start.