I presume these are Walter's parents in 1911:
https://www.ancestry.co.uk/interacti...nSearchResults
Lynwood, Cardington Road, Bedford
Walter H Allport head 63 m retired civil engineer b London Camberwell
Charlotte L Allport wife 62 m 38 yrs, 8 children, 7 living, 1 dec'd b London Camberwell
Alice E Allport daughter 32 single b Jamaica
Ruby B Allport daughter 28 single b Jamaica
one servant
Walter Harrison Allport m Charlotte Louisa Fischer 1872 Q3 Camberwell 1d 1053