Sorry Victoria, I didn't answer your question about the date of the 1945 Electoral Register.
Henry and Eleanor were in both the Civilian Registers for 1945 dated 7 May 1945 and 15 Oct 1945, so both prior to this death and burial in Dec 1945.
In case its of interest, their son, Arthur was listed in both the May and Oct 1945 Registers but he was in the Service Register listed with 47 Back Salisbury Street as his home address, so he must still have been in the forces (it doesn't specify which force he served with).
and the 1947 Electoral Register I found with just Eleanor and Arthur at that address is a Civilian Register dated 15 Oct 1947
Boo