Tommy: if she ain’t impregnable she ain’t the one

"My style is impetuous, my defence is Impregnable." - Mike Tyson

Many britons believe thier island to be impregnable, but it has actually been invaded over 60 times since 1066. Fortunately, none of these were at all successful due to either poor planning or brilliant defensive mechanisms. Britain as a whole was only conquered once, by the roman empire, who actually took several attempts and centuries to do so. The vikings and saxons had very little in comparison to what Britain would later achieve.