Found a partial answer to one question, about Presbyterian baptism. A book dated 1796, “Environs of London: volume 4, Counties of Herts, Esssex & Kent”, by Daniel Lyons, is found online, says:
Meeting-houses.
There are six meeting-houses in Woolwich, one belonging to the Presbyterians, two to the Anabaptists, two to the disciples of Mr. Whitfield, and one to those of Mr. Wesley.
Now can anyone now tell me where to find baptismal records, circa 1790, from this Presbyterian meeting house?