The Vautin family were respectable, non-conformist Christian, middle class people. James Theodore Vautin was a non-conformist minister, and maybe his son James was too (not sure about this). James Theodore Vautin worked at the Bank of England, and was Principle of the Treasury when he retired (not sure what that is). They are likely to marry other non-conformist Christians, sometimes meeting future spouses at the local Meeting or church they attended. James Vautin jnr. married Hannah Hooper, whose family attended the Queen Street Meeting in Ratcliff, Stepney, Middlesex, England. James Vautin baptised some of the Hooper children. One of the Hooper family worked as Agent for the Governor of the Bank of England, William Mellish; a brother and nephew had jobs at the Bank of England. The Hooper father, John, had a business as tailor and selling ready-made clothes, and supplying ships with a range of essentials (hammocks, you name it...). So these families are businessmen, or have solid jobs or careers, and are upstanding members of their community. They are neither poor nor working class. John Hooper snr's wife was Mary Calder, so she may have been the Mary Hooper who was present at the birth of the Vautin children at Nottingham Place, Stepney, in 1819.
Stepney was outside the City of London walls, and even in 1813 still had green fields, farms and market gardens. A lot of people associated with shipbuilding, provisioning and supplying ships, plus seaman and ships' captains, and so-on, lived near the river at Stepney. People in a range of income groups lived there, from the poor to the fairly wealthy. The overpopulated, horrific, slums became a problem later in the 19th Century, but these middle class families had moved out to new, greener, suburbs by then (Greenwich over the river, else out towards Walthamstow, Woodford, northwards). James and Hannah Vautin migrated to Australia.
My grandmother (a Hooper) told my mother that there were Huguenot family members in the past - this may have been the Vautin family.