So a few suggestions for networking
Facebook if DNA related at Enslaved and Enslavers Ancestors DNA Project
There is an interesting research project around the Caribbean https://www.ucl.ac.uk/
I have posted stuff at sites devoted to the Caribbean and to Georgian Genealogy.
Most of the enslaved who were fathered by their enslavers have some pretty remarkable genealogy.
I have had biracial aunts uncles and cousins since the late 18th century.
Wills are a very interesting resource
According to stats there were at least 80,000 slave owners in the UK and colonies