Thank you for your replies, I will check the USA link shortly. I know quite a lot about Clifford but it's from 1919 that I have no information.
Clifford Ellis was born 8th July 1897 Leeds West Yorkshire England, his parents were Alfred and Ellen (nee Fowler) and in 1901 he was living in Parliament Road with his parents and siblings, Henry, Albert, Edward, George and Gladys. In about 1907 his father died, and in 1908 Clifford was taken to Canada with Dr Barnardo's on board the Dominion departing from Liverpool. I have recently found out that he was taken to 214 Farley Avenue Toronto which is a Dr Barnardo's 'distributing' centre before going to Saskatchewan to work for Mr Obediah McPherson on a farm. He appears to have lied about his age on his military records, he was injured and was discharged from service in 1919.