Hi Brigidmac. I have the full tree for her parents Jethro and Elizabeth Ann. The whole scenario takes place in Devonport and I have all the birth and mariage certificates for them all including Edith Mary, which I quoted from in the original post. Her children were Margaret Elizabeth Mary Ethel Jane Coomber, Charles Frederick James Coomber (my father) and Thomas William Henry Coomber. I hold the birth and marriage certificates for both Margaret and Charles but nothing but the birth certificate for Thomas. None have a father on the birth certificate
I agree that the father's names are all fictitious (as is her birth date on the marriage certificate)
The past history is well covered but after 1920 I can't trace her or her husband John Donaghue.
Both of her children also used relations names for the father when getting married.