There was nothing unexpected, just be aware that they may ask you about your other interests in engineering. I got asked if I watched any documentaries or videos recently about engineering.
Oh yeah also make sure you know what all the benefits are of becoming an Arkwright scholar and pick what you are most interested in. If they ask, say something about the mentoring or the summer schools because I can't imagine it is a great impression to say you don't not know, or are just interested in the money.
Also also remember not to waffle