Jim - thanks ever so much - invaluable stuff.
All tied in, can you find anything a maiden name for this lady?
1841 Cenus:
Louisa Trott
Aged 7 yrs 
Living at Morrell Green, Takeley, Essex
Father Thomas (46) Occupation shown as Agricultural labourer, Mother Sophia (46) & siblings James (20) Jane (17) Sarah (15) Michael (11) Emma (1)
Its Sophia her Mother DoB abt 1795 I'm struggling with - need maiden name, parents, location etc.