Ran out of characters, some further info...
I will be requesting manual searches of records from Newcastle, Northumberland and Sunderland.
FreeBMD and GRO index searches for only the surname Battista and phonetic variations (no given names entered) from 1900 - 1922 throughout England result in no names or death ages that are close. I've found his children's death indexes, even his brothers who died in 1900 and 1936. I'm running out of ideas; any help would be much appreciated.
Not sure if this link is viewable:
Ancestry family profile:
https://www.ancestry.com/family-tree/person/tree/150930472/person/282002756595/facts1911 census, family locations:
Giovanni Battista, 64 - Missing
Wife: Anastatia Battista, 48 (Whalan) - Missing (remarried?)
Biological children (to Elizabeth E. Lawson)
Son: Pasqualino Battista, 32 - Navy (not present in 1911 census, but entries in 1911 for UK Royal Navy Registers of Seamen's Services)
Daughter: Georgina Battista (Birmingham), 29 - Staying with sister Orselina in Tynemouth.
Daughter: Orselina Battista (Spence), 26 - Tynemouth, head of house.
Daughter: Elizabeth Ann Battista, 25 - Missing (married or dead?)
Son: Antonio Battista, 22 - 3 Back Barrington Street Monkwearmonth Sunderland, head of house.
John George Battista, 20 - Tynemouth, married. Not present in 1911 census. Has a 1911 marriage index.
Vincent C Battista, 16 - 11 Alexandra St Victoria Garesfield Nr Rowlands Gill, boarder, coal miner.
William Armstrong Battista, 13 - Sculcoates, Yorkshire-East Riding, inmate.
James Battista, 11 - Tynemouth, Northumberland, inmate.
(Step-children from marriage to Anastatia Whalan)
Step-daughter: Maria Alicia Whalan, 25 - Missing (married or dead?)
Step-daughter - Eleonore Whalan, 22 - Missing (married or dead?)
Step-daughter - Anastasia Whalan, 19 - Missing (there is a potential marriage record in 1916)
Step-son - Michael Whalan - dead
All children have been separated. Anastatia Battista cannot be found in the 1911 census, although there does appear to be electoral records of her from 1913 onwards (under Anastatia Whalan). I'm not sure if this is her, I suspect this is actually her daughter of the same name. She reappears in 1934 for a death index as Anastatia Battista (age and location seem correct).
The youngest two of Giovanni's children are "inmates" at Humber Industrial School Ship.
My other posts to genealogical communities:
r/Genealogy -
https://www.reddit.com/r/Genealogy/comments/8jgvb2/missing_death_index_and_certificate_england/British Genealogy -
https://www.british-genealogy.com/threads/92019-Missing-death-index-and-certificate