At last
I have been fortunate enough to find that I can still access my contact's tree on GR.
Sadly, he doesn't have George King but the good news is that our King branch now goes back to Maldred of Scotland c1007 - c1045 and Edith Northumbria 1015 - 1041 (he seems more positive about Edith's dates)
These are the children he has for William King and Mary Kerwin, born between 1803 and 1815
William, John, Sally, Eliza, James, Mary, Amelia and John
All born in E. Malling except for the final John ~ born in Teston