The moment Britain became an island


Ancient Britain was a peninsula until a tsunami flooded its land-links to Europe some 8,000 years ago. Did that wave help shape the national character?

The coastline and landscape of what would become modern Britain began to emerge at the end of the last Ice Age around 10,000 years ago.

What had been a cold, dry tundra on the north-western edge of Europe grew warmer and wetter as the ice caps melted. The Irish Sea, North Sea and the Channel were all dry land, albeit land slowly being submerged as sea levels rose.

But it wasn't until 6,100BC that Britain broke free of mainland Europe for good, during the Mesolithic period - the Middle Stone Age.

Find out more

  • Neil Oliver's A History Of Ancient Britain continues on BBC Two, 16 February, 2100 GMT

It is thought that landslides in Norway - the Storegga Slides - triggered one of the biggest tsunamis ever recorded on Earth when a landlocked sea in the Norwegian trench burst its banks.

The water struck the north-east of Britain with such force it travelled 25 miles (40km) inland, turning low-lying plains into what is now the North Sea, and marshlands to the south into the Channel. Britain became an island nation.

At the time it was home to a fragile and scattered population of about 5,000 hunter-gatherers, descended from the early humans who had followed migrating herds of mammoth and reindeer onto the jagged peninsula.

Ancient signs of French connection

Fossilised trees in Bray, Co Wicklow

"In Bray, on the east coast of Ireland, there are fossilised trees on the beach, lying where they first grew 8,000 years ago.

"There are drowned forests off Dorset, Wales and the Isle of Wight. That's because back then, the Irish Sea, North Sea and the Channel were all dry land.

"When the great melt came, and the seas gradually rose by 300 feet, we were cut off from mainland Europe for good."

From 2008's British Isles: A Natural History

"The waves would have been maybe as much as 10m (33ft) high," says geologist David Smith, of Oxford University. "Anyone standing out on the mud flats at that time would have been dismembered. The speed [of the water] was just so great."

At Montrose, on the north-east coast of Scotland, Smith has uncovered signs of this long-ago natural disaster. A layer of ancient sand runs through what should be banks of continuous clay - sand washed inland by the inundation.

Relics of these pre-island times are being recovered from under the sea off the Isle of Wight, dating from when the Solent was dry land.

Grooved timbers preserved by the saltwater are thought to be the remains of 8,000-year-old log boats, and point to the site once being a sizable boat-building yard, says Garry Momber, of the Hampshire and Wight Trust for Maritime Archaeology (see video clip below).

The tsunami was a watershed in our history, says archaeologist Neil Oliver, presenter of BBC Two's A History of Ancient Britain.

"The people living in the land that would become Britain had become different. They'd been made different. And at the same time, they'd been made a wee bit special as well."

Simulation of how Britain gradually broke free of Europe in 6,100BC - images from A History of Ancient Britain From peninsula of mainland Europe, pictured left, to island

Being so closely bordered by water meant boat-building and seafaring became a way of life. Many millennia on from the tsunami, the British sailed the ocean waves to find new lands and build an empire.

Its more recent history bristles with naval heroes, sea battles and famous explorers. English, Scottish, Welsh and Irish migrants left their homelands to settle far and wide. And Elizabeth I was not only a notable monarch for being a woman, but for presiding over a famous naval victory, and English forays into New World exploration.

Early Britons

  • Earliest Neanderthal remains found in Britain date from 200,000 years ago
  • Earliest modern human remains are 33,000-yr-old Red Lady - actually a male mammoth hunter

But the idea of England - in particular - being a maritime nation has its roots as much in spin as in reality, says Dr Nigel Rigby, of the National Maritime Museum. An early exponent was the 16th Century writer Richard Hakluyt, who promoted the settlement of North America.

Hakluyt's writings played on the growing desire to seek new territories after the loss of Calais in 1558.

"Hakluyt's Voyages spun the idea that the English had always been stirrers and searchers abroad. But it was not really an island that had started to see a future at sea."

By the time Charles I took the throne, the lure of maritime power had taken hold. "He called his great warship the Sovereign of the Seas. It was a statement of intent," says Rigby.

And their prey

  • Early humans hunted mammoth, reindeer and wild horses when Britain was still cold tundra
  • By Mesolithic period, when tsunami came, they ate red deer, fish and hazelnuts
  • Also hunted arctic hare and ptarmigan - both still live in Scottish mountains

For hundreds of years, ships, goods and people moved to and from the British Isles. Merchant and naval ships alike were staffed by those from far and wide, some of whom settled in its ports.

But just as Britain could reach out to the world from its safe harbours, so, too, could the world reach in - and this fuelled feelings of vulnerability, says Rigby. If an invader can make it across one's watery defences, the British coastline offers an abundance of places in which to make landfall.

"The 19th Century writer Alfred Thayer Mahan made the point that if you look at the coastline of Britain, it's suited to maritime trade with good harbours. But easy access for trade means it's also vulnerable to attack from the sea.

"In times of national threat, this is a recurring fear. Hence the importance of being able to defeat enemies at sea," says Rigby.

Mahan's writings underlined the sense of Britain as an island nation, defined by its relationship with the sea. This identity was further bolstered by the likes of the novelist Erskine Childers, who wrote The Riddle of the Sands, a spy novel in the early 20th Century about a German plot to invade from across the North Sea.

"The idea of an 'island nation' is something of a cultural construct," says Rigby.

"But in Britain you are never more than 60 miles from the sea. So it's important to be able to defend the coastline, and to be able to make a living from all around that coastline too."

Start Quote

These differences fade away the moment that any two Britons are confronted by a European”

End Quote George Orwell

Many believe its island status has also shaped Britain's rather detached attitude to Europe today, which is still often referred to as "the continent".

In the past, historian David Starkey has argued that Henry VIII's break from the Catholic Church in Rome made him the first Eurosceptic.

"In plans for the elaborate coastal defences that Henry commissioned we can see how England no longer defined itself as part of Europe, but as separate from it - a nation apart," he wrote in the Camden New Journal.

"Catholic Europe was now the threat, the launch pad for invasion. In other words Henry was the first Eurosceptic: the xenophobic, insular politics he created have helped to define English history for the past five centuries."

Find out about ancient sites, and activities relating to ancient Britain, on the BBC Hands On History website.

Neil Oliver explores a 8,000-year-old settlement under the Solent


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  • rate this

    Comment number 7.

    @andy1005 Here's something else to think about. According to your argument, if enough generations of my family chop one of their arms off, our offspring would be born one armed as a consequence? I think if anyone's argument is flawed and stupid, its yours.

  • rate this

    Comment number 6.

    @ andy1005, interesting point, but are those characteristics then passed on genetically? I think not. What you are talking about is manipulation of bones, not dna, so these manipulations cannot be transferred to offspring by inheritance of dna. In other words, you can change your structure all you like, but you wont be passing those changes on genetically.

  • rate this

    Comment number 5.

    Did you know that cranial alignment/structure can change by a substantial amount if a civilization wears some kind of hard helmet on a regular basis? Did you know that arm and leg bones can change structure just by wearing something as medieval as chain-mail armour?

    I suspect the BBC's reporters of using Wikipedia sometimes. The breeding place for rubbish like early humans and modern humans.

  • rate this

    Comment number 4.

    The reason that it's flawed and stupid is that it is quite painstakingly easy to see that bone structure is easily manipulatable in the broadest possible terms.

    Bone structure can be manipulated in any number of ways and bone structure is the ONLY evidence they have to suggest that 'early humans' were different to 'modern humans'.

  • rate this

    Comment number 3.

    'even I accept the Neanderthal/modern human argument as flawed and stupid!'

    What argument is flawed and stupid? Neanderthals and modern humans are different species of human. Modern humans are the only species of human that has survived. Neanderthals are now extinct and we were clearly different from them.

    Does anyone know if Ireland always been an island by itself?


Comments 5 of 7


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