Hi Peter,
On your tree you have Florence and George in 1946 living at 86 Wavertree Road, Wandsworth.
By doing a free address search on the 1939 it would appear that a George Harrison b. 1887 and Florence M Harrison b. 1890 and one other person are living at that address. These birth dates are rather out with the ones originally posted, therefore is the 1939 entry correct for your Harrison family or are your birth dates the correct people that you are researching?
JJ