Hi again
Found these entries in the trade directories of 1852 - 1858 - probably just before your ancestors moved there
Dressmaker & Milliner.
Mme Victorine Winsor, 4 Stratford place (b. Paris 1803, married to an out-of-business tradesman; 4 daughters)
Isabella Winsor, 4 Stratford place
1862 Post Office Directory
Ford Jas, watchmaker & Jeweller, 4 Stratford Place, White Rock
1866 Post Office Directory
Foord James,Watchmaker, jeweller & Silversmith, 4 Stratford Place, White Rock
1872 Parsons Directory
Foord James, 4 Stratford Place - Watch & Clock Maker
I notice by the time of the 1881 Street Directory - 39 White Rock is still a Gold & Silversmith, but under the name of Sydney Allen.
Chris in 1066