My wife's grandfather, born 1898 in Cork, apparently served in the Army, the Royal Navy and the RFC during WW1. Post-war, he lived, married and died in West London. Not certain whether he left Ireland before WW1, and if so, where he enlisted. His surname was Williams - pretty common - and a search of Army records is inconclusive. I have not yet had an opportunity to consider RN or RFC/RAF records. Does anyone have any experience of subjects serving in all three branches? Was this common, or even likely? Assuming he had not deserted and re-enlisted under a new identity, would there be a common service number? Any advice would be welcome.
