I applied online. The process took 1 day. I interviewed at Waitrose (Solihull, England) in May 2016
Interview
Brief explanation about the company and the role.
Individual assessment task which involved looking at a list of products and matching them to a variety of customers' requirements, e.g. being health conscious, vegetarian, etc. I had to write down the products I would recommend.
Then, a group task where we all had to discuss what we would prioritise based on a day's work at a store, where various problems occurred e.g. missing stock, breakages on shop floor, unhappy customers, etc.
Finally, a one to one interview.