Hi HawkesFH
When Britannia married Thomas Gregory in Leavesden, near Watford, Herts, in 1859, she used the surname Draper rather than Lee. On her marriage cert, her father's name is given as Shipton Draper, hawker.
This suggests that Britannia was a step-daughter of Zachariah, being a daughter to his wife Charlotte presumably by Shipton Draper in a former relationship.
Curiously, one of the witnesses to the marriage was a Rosetta Lee.
I appreciate that Britannia had a half-sister of that name but she would only have been about 11 years old when Britannia married: possibly too young to be a witness? But as Boswell37 tells us, "Fighting Zacky Lee" had a wife called Rosetta. Another coincidence? Or is there some sort of familial connection between the East London Zachariah and the West London one?
Best wishes
Sharon