Just to update this thread, I did a bit of digging in the chatroom just now.
My proposed state of affairs as a result:
It's possible that Ethel M married Benjamin BEECH as mentioned by avm (with one male child). I can't see the 1939 "census" entry but can see the index, wherein her name is also "BLUNDY". I think she may have married Harold BLUNDY back down in Kent, although he appears to have died a year later. I think her death may have taken place in Coventry, where someone matching the name of her son also dies so perhaps she was with him there.
Have suggested this as a route of investigation
