There's a Mary J Thompson b 1880 in Hull in 1921. With her are Phoeby b c1902 and GH (no full name give)
Ive looked at her, and she has been in/out/in lol. She marries George H(arold) Carrington in 1920 (the image shows the correction) which of course doesnt mean she couldnt have run off to Scotland and married bigamously
I think she is the 1902 baptism as Phoebe Sophia dau of Charles & Mary Jane
but the church is different from all the other baptisms I can see.
Ive been trying to figure out if there are two Charles & Mary Jane Thompson couples
.i think there could be.
One thing in her favour though is her birthdate is given on the baptism as 1 Aug 1902 and 1 Aug is the date we have on the 1939
..
I cannot see her on the GRO or FreeBMD