Philosophy trinity college Cambridge essay competition 2016

I was wondering if anyone is thinking of writing for any of the essay comepetitions that trinity college Cambridge are hosting? If so, or if you've written a response in the past, how should it be structured? I'm thinking of writing for the philosophy competition but not sure if there is a strict structure I need to adhere to or not... Thanks anyway

Do they ask for a "strict structure"? If not, they won't require one.

You can probably find examples from other colleges.
e.g.Newnham (has previous winner's essays)
http://www.newn.cam.ac.uk/admissions/undergraduates/newnham-essay-prizes/
Peterhouse
https://www.pet.cam.ac.uk/essay-prizes