Didn't you have quite a bit of disruption recently through a volcanic eruption? Admittedly, not a UK-based one.
The floods of 1952 spring to mind as well. Not to mention that a rise in sea level wouldn't be all that good for large parts of the country.
That's one of the things the Christchurch quake brought home - it was in an area where earthquakes were unknown. I saw the farmer interviewed whose farm was right above the epicentre.
"I never knew there were fault lines here" he said.
The picture behind him showed a huge rupture running right through his entire farm - and for several miles thereafter.
He knows now!

