Assessment day, it required giving a presentation, a group design task and an interview with senior members of staff. The staff were friendly however, felt like you needed to have fairly extensive knowledge of the company during the interview stage.

Applied online. Received a email saying I was pre-selected. A few months later, they invited me to a assessment centre. Was 5 and a half hours total. Consisted of a group exercise, interview and a Q&A of current graduates in the program. It was quite challenging but overall enjoyable and even if you get declined, it's very good practice.