All you have to do is tell the security officer when your guest arrives how long you want them to stay for. You will complete a one-line sign-in sheet, and the security officer will issue a temporary pass for your guest.
If you want a guest for more than ten nights in one month, or if you want to have two or more overnight guests at the same time, you must seek the Warden’s permission in writing. Email the Warden at least seven days in advance at firstname.lastname@example.org.
For more information about guests: http://www.connaught-hall.org.uk/pages/welfare/guests.html