UniBus Student Saver
Costing just £3.50, the ticket gives a day's unlimited travel on metro services 4 and 4A, plus Unibus services 8, 8X and 10.
The ticket can be purchased any time and is valid through to the end of the day's services.
On services 4A and 8, this means it can be used up until 0500 on the days on which the all-night service runs.
Tickets can be bought on the bus, but a student ID card must be shown to the driver, to prove that you are a student.