If you get the ABB and they're in clearing then you've got a reasonably good shot, if you are just outside and exceed ABB then you've got very good chances, but if you go under ABB then your chances are lower. It will depend on whether they like your personal statement, reference etc. as well as your grades, and if they think they'll get a better applicant.
In regard to accomodation the chances are you would have to commute from home for the first 3 weeks, by which time accomodation can normally be arranged. However this is in no way guaranteed and it is possible that they will be unable to offer you accomodation at any point. You could try and find out if any current 2nd/3rd etc year students have a spare room in private houses if you'd like to live close to the uni, you may be lucky and find 3 students in a 4-bed house or similar who would be happy to have someone move into the 4th bedroom to get their rent lowered. Try looking on places like the discussion board on the Northumbria Facebook page.