Most University buildings have a fire alarm system to give an early warning in case of fire and to notify Security Services. A check to ensure there is a real fire before calling out the fire and rescue service must be made, to avoid them having to respond to false alarms.
On discovering a fire dial 999 to call out the fire and rescue service, which avoids the delay caused by this check.
Further information is provided in the following document.
10 Parks Road
Oxford OX1 3PD
Monday - Thursday: 8.30am to 5pm
Friday: 8.30am to 4pm