Due to a security vulnerability in Xen, Rackspace are updating all of their servers (not just Wikimedia UK’s) which has necessitated a restart of all their servers.

This is currently affecting us; all of our websites and services.

Service will be resumed as quickly as possible, and I am monitoring (as I can) for issues related to the restarts.

It’s not a brilliant situation, but the host has had no choice because of this major vulnerability (affecting many hosting providers).