EDIT: I was wrong about what I just cut out, seems like there are British East coast L21 Beaker samples, indicating the Dutch beakers were also L21.
Sample ID / genetic sex (M/F): I4950 / M
Find location: Central Flying School, Upavon, Wiltshire, England
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–1800 BCE
MtDNA haplogroup (mother): U5a2d1
Y-DNA haplogroup (father):
R1b1a1a2a1a2c1 (L21)
Reference: Olalde et al. 2018
Colour group: Steppe (R1b)
Sample ID / genetic sex (M/F): I4951 / M
Find location: Flying School, Netheravon, Wiltshire, England
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–1800 BCE
MtDNA haplogroup (mother): K1b1a1
Y-DNA haplogroup (father):
R1b1a1a2a1a (L151)
Reference: Olalde et al. 2018
Colour group: Steppe (R1b)
Sample ID / genetic sex (M/F): I5513 / M
Find location: Nr. Ablington, Figheldean, England
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–1800 BCE
MtDNA haplogroup (mother): V
Y-DNA haplogroup (father):
R1b1a1a2a1a2c1 (L21)
Reference: Olalde et al. 2018
Colour group: Steppe (R1b)
Sample ID / genetic sex (M/F): I2417 / M
Find location: Amesbury Down, Wiltshire, England
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–2140 BCE (based on associated dates in same context especially 23535_25004)
MtDNA haplogroup (mother): J1c
Y-DNA haplogroup (father):
R1b1a1a2a1a2c (Z290) -->Z290 (aka Z245 or Z260) : father clade to L21
Reference: Olalde et al. 2018
Colour group: Steppe (R1b)
Sample ID / genetic sex (M/F): I6777 / M
Find location: Wilsford Down, Wilsford-cum-Lake G.54
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–1900 BCE
MtDNA haplogroup (mother): U4b1b2
Y-DNA haplogroup (father):
R1b1a1a2a1a2c (Z290)
Reference: Olalde et al. 2018
Colour group: Steppe (R1b)
Sample ID / genetic sex (M/F): I6778 / F
Find location: Wilsford Down, Wilsford-cum-Lake G.52
Country: Great Britain
Associated label in publication: Beaker Britain
Date: 2500–1900 BCE
MtDNA haplogroup (mother): K1a26
Y-DNA haplogroup (father): null
Reference: Olalde et al. 2018
Colour group:
Steppe (admixture)
Sample ID / genetic sex (M/F): I2461 / F
Find location: Porton Down, Wiltshire, England
Country: Great Britain
Associated label in publication: England_CA_EBA
Date: 2500–2140 BCE (based on associated dates in same context)
MtDNA haplogroup (mother): H5c
Y-DNA haplogroup (father): null
Reference: Olalde et al. 2018
Colour group:
Steppe (admixture)
Also, in present-day Ireland, U152 is below 5% in most areas, with two pockets between 5 and 10%. Under such conditions, how could U152 have spread the Celtic language there, without any evidence that it ever demographically superseded or replaced L21 ? Insular Celtic is L21, period.