I applied online. I interviewed at Mars (Slough, Berkshire, South East England, England) in Nov 2019
Interview
The assessment centre involved a case study, group exercise and interview. The case study gave a lot of information which meant you had to figure out what was relevant and what wasn't. You then had to present to a panel.
Interview questions [1]
Question 1
Why you want to work for Mars. Some general competency questions and one factory question relevant to the function I was applying for