Hi! I am a current third-year history student at Lancaster University and thought I might be able to give you some insight into the university.
Durham and Lancaster are quite different in a lot of ways but do also have some similarities: both universities operate under a college system, meaning that accommodation is allocated by college. At Lancaster you are provided accommodation in first year, and in later years it is possible to apply to on-campus accommodation or find accommodation in the city. There is plenty of accommodation, and you are generally looking at about £100 a week including bills for accommodation in the city.
Additionally, Lancaster has a very large international community - it has previously been awarded with the international university of the year award.
Please let me know if you have any other questions!