Hi,
Reading Shatford/Shotford it didn't look right and I wondered if it should be Stratford, so out of curiosity I did a Google map search. I found one Shotford but in Norfolk, a search on Shatford came back with a question, "did you mean Stratford?"
Stratford in 1851 would probably still have been part of Essex as I believe was Bow and they are none too far from each other.
Looking at it from a spelling perspective, Shalford, Essex might be a possibility.
I read these posts on an off chance because of the name Thurston. they must be a difficult lot the Thurstons, my wife's ancestor Mary Ann Thurston was baptised in 1842 in Holywell cum Needingworth, Hunts, she then disappears and surfaces in West Ham (then in Essex) where she marries George Turner in 1865.
Her father died a few months before she was born and her mother remarried, even that new family disappear, weird, maybe they were nomads

Regards.