The freebie on the 1939 register has him living with a Mabel Cartwright + 2 others.
There's a 1928 marriage between a Mabel Foy & William Cartwright.
There's also a birth for a Mabel Edith Foy in 1906,
both of these registered in the W.Derby district.
As he was born 1933 probably not him thinking about it.
It's not him.