Hello, Jean
The entry I found for Elizabeth Sadler in Bethnal Green was incorrect, I'm sorry to say I misread the entry. & there were no entries for her in either Shoreditch or Bethnal Green census indexes, I think obtaining the marriage cert is your best bet to solving this problem as you will then have their father's names.
I have now had the chance to look at the original image for the entry for Daniel Winter, >>>
HO107/1588 fol 415 page 11
Royal Artillery Barracks, Woolwich
Daniel Winter age 26 Gunner & Driver 10th B.Royal Artillery
born Norfolk, Norwich.
The index stated his age to be 20 but looking at the image I am sure it is 26, & have found
Daniel Winter bapt. circa 1824, Sprowston, Norfolk (Sprowston is a suburb of Norwich), no parents were shown as this was entered by a member of the Mormons.
If Daniel retired from the Army his Attestation papers will together with his discharge papers in the WD section of the Army records at the main RO at Kew, Ruskin Avenue, Kew, Richmond, TW9 4DU. email..
enquiry.pro.rd.kew@gtnet.gov.uk.
These papers will contain records of his service & a description of him, if he rec'd a pension this will have been paid thro' the Royal Chelsea Hospital, records will be available at Kew.
good hunting
Meliora