Student halls are operated either by the private sector or universities. University operated halls are often based on campus (if your young person is going to a campus based university), or should be quite nearby. Halls come with all the main bills included (gas, electric, water and Wi-Fi) which can help for budgeting in first year. Some have 24/7 security and insurance included, which might help with your peace of mind.
Halls are mostly reserved for first year students, but exceptions might be made for international students, those with disabilities or care leavers.
Halls will come with the larger pieces of furniture such as white goods, sofas, desks and beds, but kitchen utensils and bedding need to be bought individually.