Hi again, so their would appear to be children born prior to the marriage in Oct 1851?
1851 census
Joseph Hart 29 occ Wheelwright & Machine maker b Pendock, Worcestershire
Mary 30
Joseph 8
Sarah Ann 4
Rocedo? 6
Fanny 1
Residing at Lawn Side, Old Taylors , Eldersfield
Census ref HO107/2043/348/18
All others born Berrow
Keyboard86
PS you really need that marriage certificate Dec qtr 1851 Upton for more clues?