Went to an assessment day onsite, most was group work where we had to do case study problem solving and out of the box problem solving "competitions". Had to present a preprepared presentation about a new idea for the company. Individually went for interviews of different lengths, each varied slightly depending the section of engineering the interviewee was in. I was asked about how I would improve different aspects of one of their products such as: health, flavour, sustainability etc. I was also asked about aspects of my CV.