The Westminster University website says:
ISLS Outage day
There will be a scheduled outage of all central information systems on Saturday 19 January between 7am and midnight for essential maintenance and testing.
There will be no access to any information systems on or off-campus during this time.
Services affected include:
* Library catalogue
* Library self-service machines
* Wireless network
Hopefully the work will be done by Sunday and won't overrun!