Great.
Mid Bronze Age would be surprisingly early, but that level of replacement doesn't surprise me. I was never convinced by the idea that the Celtic influence in Britain was minor.
Now that we know the replacement rate, should be able to calculate the approximate genetic profile of the invading Celts just in G25, based on Early Bronze Age vs Iron Age/Roman British.
Code:
Target: England_CA_EBA
Distance: 3.1945% / 0.03194460
53.6 Yamnaya_RUS_Samara
31.0 TUR_Barcin_N
15.4 WHG
Target: England_MBA
Distance: 3.7488% / 0.03748788
51.6 Yamnaya_RUS_Samara
32.6 TUR_Barcin_N
15.8 WHG
Target: England_IA
Distance: 3.8860% / 0.03886000
49.6 Yamnaya_RUS_Samara
36.6 TUR_Barcin_N
13.8 WHG
Target: England_Roman
Distance: 4.1337% / 0.04133724
48.6 Yamnaya_RUS_Samara
36.8 TUR_Barcin_N
14.6 WHG
So probably something like:
45-46% Steppe
40-41% Farmer
12-13% WHG
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