After completing the online tests (which take quite a while), I received a text and email notification inviting me to choose an interview time slot for the next week. I chose a time and began looking into extra details surrounding Waitrose. You are asked to arrive at the store at least 15 minutes before your interview time, and to report to the store's main desk. The employee there asked me to sit in some chairs next to the checkout whilst she let the interviewer know. I was waiting for around 10 minutes. I was approached by one of the hiring managers and taken to an office in the back - she was very friendly. She asked for my passport first as proof of being able to work in the UK and then explained the interview process to me briefly - you then are asked a range of general questions about your past experience and questions based around Waitrose. At the end of the interview she asked if I had any questions and explained what would happen following the interview, and then I was escorted back to the shop floor. The only thing I would mention is not to feel too disheartened if you don't hear anything very quickly - I was told to check my emails throughout that week and after not hearing anything for 2 weeks I was close to accepting that I had probably been rejected. However, exactly 2 weeks after the interview I received an email offering me the job!