Could a large earthquake ever hit Britain and Northern Europe?

Its just that on the National Geographic channel, there was a doentary called 'Quake Threat UK'. According to this, there has been a hidden fault line recently discovered that is as long as San Andreas fault line. They say that it will be WHEN, not IF, it creates more stress, it will cause a big earthquake in the possibly near future that according to the scientist on their; it will destroy many buildings, destroy Dams that create mive floods and destroy Nuclear Power Stations. What is your thought on this.