Hi and welcome
The first step will be to find him on a census after his marriage to find a year and place of birth for him.
I would imagine you have already done this within your 12 years! But you havent given the details in your post, so here it is
1901
31 Russell road, Chadwell St Mary
Robert Page Sowter 29 commercial clerk bn Colchester
Amy 27 bn Putney (London)
Cyril W 2 bn Tilbury
Reginald G 11mths bn Tilbury