It was caused by a massive underwater landslide – the infamous Storegga slide – on the edge ... Bizarrely, this wasn't Britain's only tsunami – we've been struck by several mega-waves ...

But around 8,200 years ago, a combination of melting ice sheets and a massive tsunami from the Storegga Slide submerged the region. Doggerland is now known as the "Atlantis of the North Sea," and ...