Thanks for the suggestions but it was from the death certificate that we actually got Florence's address and the death was registered by a J Harvey
Cuthbert, occupier, West
Ham Mental Hospital, Ilford so that was no help!
Regarding the death of her husband Benjamin H
Vaughan, I don't think the death registered in 1922 was him, as his second name was Henry but there was also a Benjamin
Hobson Vaughan shown as living in West
Ham on the 1911 census and Florence's death certificate states 'wife of Benjamin
Vaughan' (not widow) with his occupation as 'occupation unknown'. This would indicate to me that he was still alive at the time of her death in 1929 but, as he was a merchant seaman, he was probably away at sea which is why they would have no details.
Also, thank you for the marriage info but we do have their marriage certificate.
The one thing that does intrique me is where have you found a twin sister for Benjamin called Margaret? In all my hunting I haven't even been able to definitely find him on the birth registers or the census records, let alone with a twin sister! If you could let me know where you found this I would be very grateful.