They were showing it on the news this morning here. The say it's been some 20 years since your last tornado.
The FAQs on Torro (The Tornado and Storm Research Organisation) website suggest that an average of 33 happen each year. They also list (very generally) the most usual areas in which they occur.
I once saw a waterspout off the coast of Devon. Absolutely beautiful.
I point out this recent article.
The UK has the highest number of reported tornadoes for its land area of any country in the world, experts say. Just last Tuesday, a mini tornado blasted through the village of Bowstreet in Ceredigion, west Wales, causing thousands of pounds worth of damage to homes and other buildings and flattening trees and fences. Dr Terence Meaden, deputy head of the Tornado and Storm Research Organisation (Torro), said about 70 tornadoes were reported across the UK in 2004 and 2005, with 40 this year.
Dr T Theodore Fujita, an American meteorologist, first recognised the UK as the top site for tornadoes in 1973, and Torro had confirmed his findings ever since, Dr Meaden said.
From http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=421156&in_page_id=1770