It was actually very causal, met at the customer service desk and they sign you in and scan copies of your passport. Sat in the waiting room with other interviewees and go to a meeting room. You are split into 2 groups and work on a few prompts such as dealing with a difficult customer and highlighting certain products for events etc. Then fill in availability sheets and preferred departments. Then there is an opportunity for final questions and you hear back within 2 weeks (depending on when they have finished interviewing all candidates).

Was in a small group of around 8-10 people. We were asked our names and our favourite thing about Christmas. Then we were given a sheet with different scenarios on it and had 5 minutes to make notes on how we'd approach these scenarios before sharing our answers as a group. Some people dominated the conversation, making it hard to get a word in with interrupting.