Hi, hope this is useful. Copied from confirmation email, regarding college allocation.
Our admissions process, works as follows: 1. Your UCAS application will be sent to the department (or departments in the case of Joint Honours candidates) that delivers the programme to which you have applied. An academic admissions selector will consider your UCAS application and make a decision - some applicants will be invited for interview but most decisions will be made without interview.
2. If the department decides you are to receive an offer, details of this will be communicated through UCAS. If, sadly, we are unable to make you an offer, this outcome will also be communicated through UCAS. If you do receive an offer through UCAS, your campus code, that is the code for your college preference, will change to Z to show that your college allocation is pending. Please note that you will not be able to change your college preference from this point onwards except in exceptional circumstances.
3. The first round of college allocations for applicants who have received an academic offer by 1st February will take place by 1st March and then regularly after this date for applicants who receive an academic offer after 1st February. At this point, should the date not have already passed, you will also be invited to an post-offer open day. The dates of the Post-Offer Open Days at Durham City Campus are: Mon, 16 March (eve) and Tuesday 17 March 2015 Tue, 17 March (eve) and Wednesday 18 March 2015 The dates for the Post-Offer Open Days at Queen's Campus are: Tuesday, 17 March 2015 (non-residential) Wednesday, 18 March 2015 (non-residential)
If your department decides that you are to receive an offer, your application is automatically considered for your preferred college. All colleges have a limited number of offers they can make to applicants from each department. Where an applicant has expressed a preference for a college and the college has space then the applicant will be offered a place there. If the number of applicants with departmental offers expressing a preference for a college exceeds the space available then the allocation will be a blind selection of those applicants. This inevitably means that some applicants cannot be placed at their preferred college. If this happens we guarantee to find you a place at a different college. If you have not nominated a college in your UCAS application, we will allocate one on your behalf. The important thing to remember is that anyone who has been accepted by an academic department via UCAS will secure a place at one of our colleges.