The interview process consists of two stages. The first stage is a group interview which happens in the evening. The store cafe is closed at that time so you are asked to wait there until everyone arrives. I am not sure but there is a high chance that you are being observed from that point. The group interview is very informal, you will work in pairs or groups of three. The main tasks were to introduce you partner and to try to sell a mystery item. At the end of the interview, you fill out an availability questionnaire and state a first and second preference for department.
If successful at the group stage, you will receive a call inviting you to an individual interview with the department manager of either your first or second choice department. The interview questions are very standard then the manager will take you to the shop floor to give you a feel of what the job would be like including trying to find three items on the shop floor. At the end of the interview, they may offer you a job on the spot or you may receive a call a couple of days later to offer the job.