Claude and Eric must have returned to England at some point - here they are en route back to Canada:
SS Empress of Canada
30 May 1923 Southampton-Quebec
[Among 2nd class passengers bound for Quebec]
Claude EMERSON, 20 and Eric EMERSON, 16, both employed in farming.
Last UK address: Bower Hinton, Martock, Somerset.
Intended future permanent residence: Canada
Edited: they had arrived from Canada on 16 April 1923, so the visit was just for a few weeks.