This year there are 2-3 class reps per year. They all sit on the Student-Staff Consultative Committee (SSCC) where staff and students discuss issues within Biology. They should be your first point of contact when you have an issue related to the School; if they can't help directly, they can help you find someone who can. Everyone on this year's class rep team is approachable and happy to help.
As School President, I work with the other School Presidents, the Students Association and the University Administration to identify overarching issues and to come up with solutions. I chair the SSCC and am on Biology Teaching Committee. Mostly though, I organise things, including feedback. If you have an issue that you feel might be important beyond a specific module, you are welcome to contact me.
Outside of that I study Ecology & Conservation. I enjoy SPSS sessions under the stars, long walks to the North Haugh submission boxes, and 2000-word candlelit dinners, +/- 10%.