East and Prosser Families of Ross. (General)
Searching the National Archives site for WW1 Campaign Medals gives 42 Albert Easts, but none specifically Albert SYDNEY East.
http://www.nationalarchives.gov.uk/documentsonline/search-results.asp?searchType=browse...
Guessing his likely Regiment from these 42 possibles, could this be your Albert I wonder ?.
http://www.nationalarchives.gov.uk/documentsonline/details-result.asp?Edoc_Id=3613958&a...
Private Albert East number 4140 Welsh Guards, 1914-1920.