Arup Graduate Energy Consultant interview questions

Fairly long, okay process and the interview was difficult to get to. for the interview we were asked to present a 5-minute presentation on a technical matter but at a basic level. It was difficult to choose what could be easily understood so I took something basic, sticking to the interview brief, and ended up being laughed at! Not professional at all. I was offered travel expenses and feedback and months later still not received either. I hope this is a one-off. It is incredibly competitive to get a job with Arup, and in general, my experience was good before the interview, but tarnished by the interview.