Hi
On the 1871 census Sarah gave her birthplace as Brompton and on the 1881 census Knightsbridge.
1851 census HO107 1480 folio 754
3 Knights Green Hamlet of Knightsbridge St Margarets Westminster
Martha Bailey 31 Head Widow Laundress Chelsea Middlesex
James Bailey 11 Son Knightsbridge Middlesex
Sarah Bailey 11 Months Knightsbridge Middlesex
Births Dec 1849 BAILEY Sarah Westminster 1 421
or
Births Sep 1849 DUTTON Sarah Westminster 1 435
1841 census HO107 738/17 folio 20
High Road Knightsbridge St Margaret Westminster
George Bailey 30 Plasterer J(ourneyman) not born Middlesex
Charlotte Bailey 20 born Middlesex
James Bailey 2 born Middlesex
26th August 1838 St Luke, Chelsea
George Dutton Full Age Bachelor Plasterer 2 Phoenix Place Knightsbridge Thomas Dutton Plasterer
Charlotte Martha Pollard Full Age Spinster 2 Phoenix Place Knightsbridge James Pollard Plasterer
Marriage by banns. Both signed
Witnesses James Fowler and W Turner?
Births Dec 1845 Dutton Ann Elizabeth Westminster 1 432
Deaths Jun 1847 Dutton Ann Elizabeth Westminster 1 362
4th January 1846 Holy Trinity Brompton born 15th October 1845
Ann Elizabeth Dutton, parents George and Charlotte Martha, 5 Hoopers Court, father's occupation plasterer
Same church burial 8th June 1847
Ann Elizabeth Dutton aged 2 Knightsbridge
Same church burial 30th March 1850
George Dutton Bailey, Hoopers Court aged 35
Possibly this death registration as the burial is indexed as George Dalton Bailey but the actual entry looks just as likely for Dutton but it should really be a Westminster death registration so it may just be missing from the GRO index
Deaths Mar 1850
DALTON George Kensington 3 218
Baptism 31st July 1842 Holy Trinity, Brompton Road
Robert Thomas Bailey parents George and Martha, 1 Phoenix Place, father's occupation Plasterer
same church burial 9th April 1844
Robert Thomas Bailey Hoopers Court aged 2
Deaths Jun 1844 BAILEY Robert Thomas Westminster 1 342
Regards
Valda