Hi, Frances appears in Rochford, Essex on the 1939 war register with her son Charles. She is living with an Albert Munday and 2 other children.
These 2 daughters can be found on Freebmd under birth name Munday with mother's maiden name Middleton. 1 born 1934, 1 born 1937 both in Rochford.
When Frances died in 1987 her death is recorded as both Frances Munday & Frances Middleton, both have the same ref.
Son Charles died 1995 Stevenage, Hertfordshire.
John