After online application had an telephone interview lasting 30 minutes. I was told it would be a competency based interview. The women I spoke with was very friendly and nice, gave a good overview of the interview beforehand. Started with three competency based questions, followed more role specific questions

Online application: CV + 500 word question about you, Telephone Interview: Standard Competencies which are available on their website and easy to find, Assessment Centre: Competency based interview again, case study with questions about it after, group exercise also based on the same case study.