I applied online. The process took 1 week. I interviewed at Five Guys (Sheffield, England) in Oct 2015
Interview
you applied online (well i Did) then you get an invite for the interview., the interview involves group task (which was fun) to see you teamwork and communication skills then one tone interview,
Pretty chill' easiest interview ever,
Ask about who you are and what you like always looking staff who can be available all the time, asks why do you want to work there and about availability
Trial shift for 2 hours. Shown around various parts of resturant. Shown how to clean the resturant and how to make the food, focusing on preparing and dressing the burgers.
Interviewer asked me basic questions about myself. She then talked about her experience working in the industry. The interview lasted about 15 minutes and was easy. Basically a get to know you type of interview.