Large-scale migration into Britain during the Middle to Late Bronze Age

AI interpretationAI-generated

Bronze Age Britain saw a major migration from France that reshaped English and Welsh ancestry.

By analysing 793 ancient genomes, researchers found that between 1000 and 875 BC, people in southern Britain (England and Wales) gained more early European farmer ancestry. This was due to migrants from France who arrived over several centuries and eventually contributed about half the ancestry of Iron Age people in England and Wales. Northern Britain (Scotland) did not see this increase. The migration likely helped spread early Celtic languages into Britain.

• Between 1000 and 875 BC, early European farmer ancestry increased in southern Britain but not in Scotland, due to migrants genetically similar to ancient French individuals.
• These migrants contributed roughly half the ancestry of Iron Age people in England and Wales, providing a plausible vector for the spread of early Celtic languages.
• The lactase persistence allele rose to about 50% in Britain by the Iron Age, while in central Europe it remained around 7%, suggesting different dairy use.

Sample interpretation

The study generated genome-wide data from 793 individuals, increasing Middle to Late Bronze Age and Iron Age data from Britain by 12-fold and from western and central Europe by 3.5-fold. The site samples total 812, with 404 Y-chromosome haplogroups resolved. The most common Y haplogroups are R-CTS241 (30), R-P312 (28), and R-L2 (24), while top mitochondrial haplogroups include T2b (22), T1a1 (18), and K1a4a1 (14). The largest site sample is I20523 with 48 individuals.

For genealogy enthusiasts

This study shows that a major migration from France around 1000 BC significantly shaped the ancestry of people in England and Wales, contributing about half of their Iron Age ancestry. It also highlights regional differences within Britain and distinct dairy-use patterns, offering a deeper context for British ancestry.