Hi!
For private rented accommodation, which is what many students opt for, you will want to start looking quite early on, once you have decided who you'd like to live with and how many people. You can book viewings for houses you see on websites such as Rightmove or Unihomes, and an estate agent will meet you at the property to show you around and tell you more about the contract and terms, and how to apply/secure the property. Different companies have different policies, you may need to pay a holding deposit or fill out a form, so make sure to ask your estate agents lots of questions before making any decisions. I would also recommend getting a university advisor to look over your contract/tenancy agreement before you sign it! Most universities should have support staff or teams that can give you advice (for free) on any housing issues.
Applying to university-owned halls of residence usually happens later in the year compared to private flats, so if you do not manage to secure a rented flat, you can easily apply for university accommodation again!
Good Luck!
Lia | Student Ambassador