Replacement Tenant for Lucia Foster Welch accom

i plan on applying to switch to a university hall on 2nd November, but i'll need a replacement tenant for my current accom. it's at lfw, its a bronze shared accom and is £115 per week. i'm switching cause the commute is too much for me physically while being chronically ill, and i would benefit greatly from living in a hall on campus. I'm asking early to hopefully have a replacement sooner to make switching easier.