 Sardinian-like Neolithic farmers did populate Britain (and all of Northern Europe) during the Neolithic period, however, recent genetics research has claimed that, between 2400BC and 2000BC, over 90% of British DNA was overturned by a North European population of ultimate Russian Steppe origin as part of an ongoing migration process that brought large amounts of Steppe DNA (including the R1b haplogroup) to North and West Europe.Modern autosomal genetic clustering is testament to this fact, as both modern and Iron Age British and Irish samples cluster genetically very closely with other North European populations, and somewhat limited with Galicians, Basques or those from the south of France.Such findings have largely put to rest the theory that there is a significant ancestral genetic link (beyond being Europeans) between the various 'Celtic' peoples in the Atlantic area, instead, they are related in that male lines are brother R1b L151 subclades with the local native maternal line admixture explaining the genetic distance noted.