Leader of a Team Question:

If possible, think work related. There will hopefully be a number of things you are most proud of in your career to date. Think about your key achievements; were they commercial, people or process orientated? What was the cause and effect? How were you involved, what was improved, saved or developed.
If you are short on career-based examples, use personal achievements which demonstrate the commercial skills required for the role, such as team work, commitment, empathy, determination, attention to detail, etc.