On the 1851 census there's:
Edwin Haughton, visitor, unmarried, 4, b. Newington, Surrey
Rosa Haughton, visitor, widow, 29, miliner, b. Steatham, Surrey
They're at 2 Barton Cottages, Cross St, Lambeth in the same household as
Alfred Platt, head, married, 31, painter, b. Clapham, Surrey
Ellen Platt, wife, married, 29, landress, b. Tooting, Surrey
Could that be him?