I applied online. The process took 5 days. I interviewed at Waitrose (Bristol, England) in Apr 2016
Interview
Applied on line; day after closing date I was called for interview. "One on one" with personnel manager and replenishment manager in comfy chairs - no desk between us! No group session. Fairly informal, mixture of PM's questions and some mandated by Head Office. Felt more like a chat than an interview. Enjoyable experience!