I only know for the four I applied to but here goes...
Bristol - Interviews are usually around late November/December with a few spilling over into the new year. Some rejections will come around then but most will be around jan ish when they know exactly who they are interviewing. If they really like you, you will get an offer within a couple of days, same goes for if they dont think you're suitable and unfortunately get rejected. If you're good but not exceptional it may be a few weeks before you find out and if you're borderline, they will keep you "on hold" until after the last interview, sometimes until March. Everyone is normally told by March one way or the other.
Liverpool - They have 3 stages. The first is academic, if you meet their criteria, you move onto the next stage, if you dont, and there are no special circumstances, you are notified of rejection. This is usually in early jan. Stage 2 is a work exp questionnaire some time in late jan/early feb. If you have sufficient work exp you will be invited to interview in feb/march. If not you are rejected. After interview most people are informed of a decision within a week.
Nottingham - Everyone has to complete an online questionnaire, some time in december or jan I think, based on this people are selected for interview in late jan/february. Initial rejections are also made at this stage. Offers arent made until every single person has been interviewed cos they judge you compared to the rest of the interviewed people and choose the best. So offers and rejections are given out sometime in late feb/march.
RVC - Interviews are in 2 batches, one in late oct/november/early december and another in late jan/feb. Offers and rejections are generally made 2-4 weeks afteer interview but for people interviewed in the first batch, this maybe slightly longer depending on when BMAT results are released.