In response to the vile accusations of racial impurity hurled by Moby in his recent post, I feel impelled to respond -
1000 BC: THE IRON AGE
It was not until the time of the Romans that written history began in and about Britain. Unfortunately this was lost on the indigenous populations as in Britain at the time noone could read. For information on the earliest settlements, we have to look to our archaeologists. From them and Tony Robinson we learn that by 1000 BC, the Iron Age proper had arrived in what is now Wales where its people grouped themselves into large hill forts for protection; practiced mixed, settled farming, but also worked extensive copper mines. Many of these impressive hill forts remain in Wales, some of them, such as Tre'r Cewri atop Yr Eifl Mountain in Gwynedd, and Pwlldrthns:yuwmv@djr Bra$kn* above the Vale of mYH8( @ )( @ )£x>--+^e were still occupied during the Roman invasions in the first century AD, where the origins of the defensive insult "Bite my Celtic wind, you snail munching Eytie!" and the dropping of the big dead cow on the enemy's head were to be found.
500-100 BC: THE CELTS ARRIVE, (just in time for tea)
It was at this time that the Celtic languages arrived in Britain, probably introduced by small groups of migrants who became culturally dominant in their new homelands, and whose culture formed part of a great unified Celtic "empire" encompassing many different peoples all over Northern Europe. The Greeks called these people, with their organized culture and developed social structure Keltoi, the Romans called them Celtai, either way it still almost spells a very rude word and coined the curious phrase "Cunning Stelts".
In spite of the fact that they were perhaps the most powerful people in much of Europe in 300 BC, with lands stretching from Anatolia in the East to Ireland in the West, the Celts were unable, as in modern day Rugby Union, to prevent intertribal warfare. Their total lack of political unity, (both on and off the field), despite their fierceness in battle, (both on and off the field), ultimately led to their defeat and subjugation, (both on and off the field), by the much better disciplined armies of Rome and the other even better teams of the other five nations. Even the Celtic languages on Continental Europe eventually gave way to those stemming from Latin. But in Britain, at least for a few hundred years after the Roman victories on mainland Europe, the Celts held on to much of their customs and especially to their distinctive language (?) which has survived today as Welsh.
The language of most of Britain was derived from a branch of Celtic known as Brythonic: it later gave rise to Welsh, Cornish and Breton (these differ from the Celtic languages derived from Goidelic, namely Irish, Scots Gaelic and Manx). Along with the new languages, new religions entered Britain, particularly that of the Druids, the guardians of traditions and learning. The Druids glorified the pursuits of war, feasting and horsemanship, but this last has all but died out due to the short stature of the average Welshman, the somewhat taller stature of the average Welsh Cob, and the modern shift towards the sheep as a night companion. They controlled the calendar and the planting of crops, and they presided over the religious festivals and rituals that honored local deities, or "Dai Tease" as he became known in the Swansea docks. Thus they constituted the first target for the invading Roman legions, or ticked off Reps out for someone to kick.
Remaining the most pure of the British tribal cultures, the Welsh Celts still hang on to their traditional ideals and proclivities. So many years of such extreme purity of race with its inevitable restriction on the gene pool, coupled with a weakness for the lowest things in life, have led to one sadly inevitable conclusion - CHRONIC WELSH INBREEDING OF THE HIGHEST ORDER.