Self isolating
You should stay in a well-ventilated room with a window to outside that can be opened, separate from other people in your home. Keep the door closed. Use a separate bathroom from the rest of the household, if available. If you have to share these facilities, regular cleaning will be required.
If a separate bathroom is not available, consideration should be given to drawing up a bathroom rota for washing or bathing, with the isolated person using the facilities last, before thoroughly cleaning the bathroom themselves (if able or appropriate*). Ensure the isolated person uses separate towels from other household members, both for drying themselves after bathing or showering and for hand hygiene purposes.
If you live in shared accommodation (university halls of residence or similar) with a communal kitchen, bathroom(s) and living area, you should stay in your room with the door closed, only coming out when necessary, wearing a facemask if one has been issued to you.
If you share a kitchen with others (such as university halls of residence or similar), if possible avoid using it whilst others are present. If this is not possible then wear a facemask if you have been issued with one. Take your meals back to your room to eat. Use a dishwasher (if available) to clean and dry your used crockery and cutlery. If this is not possible, wash them by hand using detergent and warm water and dry them thoroughly, using a separate tea towel.