http://www.homeoffice.gov.uk/media-c...rrorist-threat
Increased risk of Irish-related terrorism
Friday, 24 Sep 2010
"The Security Service has raised the threat level from moderate to substantial. This means an Irish-related terrorist attack is a strong possibility.
The system of threat levels aims to keep you informed about the risk of terrorism at any given time. It also helps police and other law enforcement agencies decide how to allocate staff.
This is the first time an Irish-related threat assessment has been published. The threat from international terrorism remains severe."