Celtic invasions

Around 300 BCE, a group from the Gaulish Parisii tribe apparently took over East Yorkshire, establishing the highly distinctive Arras culture. And from around 150–100 BCE, groups of Belgae began to control significant parts of the South. These invasions constituted movements of a few people who established themselves as a warrior elite atop existing native systems, rather than replacing them. The Belgic invasion was much larger than the Parisian settlement, but the continuity of pottery style shows that the native population remained in place. Yet, it was accompanied by significant socio-economic change. Proto-urban, or even urban settlements, known as oppida, begin to eclipse the old hillforts, and an elite whose position is based on battle prowess and the ability to manipulate resources re-appears much more distinctly.