There is a Violet Mabel Sibley death in Kensington so I think the Alfred of that original marriage isn't yours and the Alfred Sebley death in Kensington is her husband. I am assuming Sibley is a transcription error, anyone one with a sub to deceased online could check if there are images and addresses, I let mine lapse.

Or if it is him he might have been leading a double life and flitting between the two or he was just living with Florence in Battersea.

https://search.ancestry.com/cgi-bin/...off=&ml_rpos=1


https://search.ancestry.com/cgi-bin/...off=&ml_rpos=1