I've just seen the news that Kent has been hit by an earthquake. (BBC News: 'Earth tremors' reported in Kent) The focus is Folkestone, but effects have been reported as far north as Herne Bay and it seems people in my old stomping ground of Canterbury have been woken up as well.
In true internet style, there are already Facebook groups being set up (both imaginatively entitled "I survived the Kent tremor"), running commentaries online (keith_london: Kent Tremor) and so forth.
So far there doesn't seem to be much major damage, although there are reports of explosions and worries about gas. The Channel Tunnel appears to have survived.