Just in case anyone else can spot something, I can't - I've been trying to find John on ships, and possibly the 2nd wife on the same ship along with him. It's possible - one newspaper report mentioned John had last seen Alice Hilda in July 1922 when she left the ship (that he was on as Chief Officer, the SS Maresfield) at Cornwall and returned to London.
Crew list 1920, show John MIDDLETON, age 48, 1st Officer of the "SS Maresfield" , so born abt 1872.
Cheers
AMBLY