Fairly uncommon YDNA Haplogroup for Britain. Males with YDNA Hap G are excluded from a direct male lineage outside of Hap G, thus all common male ancestors will only have Hap G SNPs.

Unveiling the Power of Big Y-700: Unraveling the Journey and Advantages
https://blog.familytreedna.com/big-y-700/

STANCEL, GODWIN & STEVENSON BigY SNP Haplogroup (Direct Male Line), family branches for STANCIL, pending BigY test.

Stancil: Godwin: Stevenson (need more BigY test)
G-M201>L89>L156>P15>L1259>L30>L141>P303>L140>PF3346>Z3065>PF3345>L497>CTS9737>Z1900>Z6901>Z1817>Z727>CTS2230>Z726>CTS4803 STANSELL 1850BCE >S2808 STANCIL 1750BCE >Y3098>FGC8303>S1786>S2798>FT417876 GODWIN 1400CE > FT418057 STEVENSON 1901CE

Haplogroup G: https://www.marres.nl/EN/G-M201.htm