Boyt G2 SNP Line Britannia
https://en.wikipedia.org/wiki/Britannia

H-Y20839 Arrives First along the Suffolk Coast of the North Sea abt 1573 BCE, source FTDNA Discover
SNP Tracker shows H-Y20839 as 1570 BCE
http://scaledinnovation.com/gg/snpTracker.html?snp=H-Y20839
Use map menu, three bars upper right) Select Zoom to Europe, show walker, show descendants, borders, rivers, skulls press play on migration > top right of map.

Now use the SNP TAB to see the dates and the 92 YDNA matches, click on the skull for H-Z19008 to see names of the matching sample, study, location and google map placement.

H-P96>Z19008>Z19080>SK1180>Z19072>Z19089>Z19049>SK1182>Y20839>Y21630>BY37186>BY37188

Ancient YDNA Matches at SNP Tracker:
92 matches at H-Z19008 matched with 175 tested members. Age 14,700 BCE
See Spread Sheet for names, locations and links
NOTE: Sample years are listed "Years before Present"
The 4 matches in France that we discussed a few years start with FLR and dated around 5,800 to 6,600 years before present. Average range 6,200 years ago = 4,176 BCE. The 2 matches in Ireland dated about 5,500 years before present which would be = 3,476 BCE. Source of conversion:
https://datetimecalculator.net/years-ago-calculator

General SNP Tracker Note:
SNP H-Z19008 was formed 30,580 years ago. Sample dates in the table are typically radiocarbon dates.
A red cross-out indicates a SNP or date misassignment: a site cannot be older than its SNP.
Quiles data are from "all-ancient-dna-2-07-73-full UTF16.xlsx" available at Carlos Quiles' website.
Reich data are from "v54.1.p1_HO_public.anno" available at the Reich lab website.
The formed-to-age ratio (FAR) is Jari Kinnunen's useful metric. FAR values near 1.0 means that the ancient remains date from when the SNP first arose. Remains with large FAR value are much later than the SNP and unlikely to be on your SNP path.